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The first structurally characterized alkali metal phospho­nate, the title compound, [K2(C6H6O3P)2(C3H7NO)(H2O)]n, has a complex structure, with layers parallel to the crystallographic bc plane consisting of two crystallographically independent K atoms sandwiched between the three types of ligands present in the structure, viz. water molecules, dimethyl­formamide molecules and two crystallographically independent phenyl­phospho­nate ligands. Six O atoms coordinate to one K atom and seven to the other. The interlayer distance is 15.327 (4) Å. The K—O distances are in the range 2.739 (2)–2.932 (2) Å for the seven-coordinate K atom and 2.650 (2)–2.821 (2) Å for the six-coordinate K atom.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S0108270105001526/jz1691sup1.cif
Contains datablocks global, II

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S0108270105001526/jz1691IIsup2.hkl
Contains datablock II

CCDC reference: 269005

Comment top

Metal phosphonates have been much used as inorganic–organic hybrid materials because of their potential applications (Clearfield, 1996, 2002). Complexes with metal ions frequently form laminar structures in the solid state that consist of PO3···M···O3P layers separated by the organic groups (Vioux et al., 2004). The phosphonate group permits flexibility in the construction of solids, with the possibility of forming strong hydrogen bonds between the hydroxy groups and terminal O atoms (Mahmoudkhani & Langer, 2002). Complexes with a variety of metal centres (alkaline earth, transition, main group or lanthanide, usually in the +2 to +4 oxidation state) have been studied (Cao et al., 1988, 1990; Poojary et al., 1996; Mahmoudkhani & Langer, 2001; Mahmoudkhani et al., 2002). However, until now, no structure of a phosphonate complex with a monovalent metal has been reported. The only similar complex whose structure has been reported is aquapyrazole-4-sulfonatepotassium (Mezei & Raptis, 2003). The sulfonate group, SO3, has a structure similar to that of the phosphonate but forms much weaker bonds to metal atoms (Côté & Shimizu, 2003).

Alkali and alkaline earth metals have a rich coordination chemistry with O-atom donor ligands (Poonia & Bajaj, 1979), which prompted us to study their phosphinate complexes. In the case of potassium phenylphosphinate, accidental aerial oxidation of the anion during the preparation led to the formation of potassium phenylphosphonate, (I). Repetition of the synthesis with hydrogen peroxide as the oxidation agent led to the pure product. A DSC analysis of (I) showed no peaks from 323–623 K, demonstrating the thermal robustness of the compound. A sample of (I) prepared in methanol showed good crystallinity [Tm = 585.5 K, ΔHm = 66.8 J.g−1 and Tc = 512.6 K, ΔHc = −24.3 J.g−1. Crystallization of (1), by the slow evaporation of an aqueous dimethylformamide solution of potassium phenylphosphonate in a desiccator produced good quality plate-like crystals of the title compound, (II).

We report the here the structure of (II). A view of the asymmetric unit is given in Fig. 1. Table 1 lists selected distances and angles. The extended structure of (II) consists of complex layers parallel to the crystallographic bc plane. The interlayer distance is 15.327 (4) Å. Layers consisting of two crystallographically independent K atoms lie between double layers of the ligands (water, dimethylformamide and two crystallographically independent phenylphosphonate ligands), which form bonds to the K atoms via their O atoms. An extensive network of hydrogen bonds (Table 2) is observed. An approximately square two-dimensional net is formed, with chains of phosphonate ligands parallel to the y axis linked by hydrogen bonding between their hydroxy H atoms and anionic O atoms, and interconnected in the crystallographic z direction by hydrogen bonds between the doubly bonded O atoms and water H atoms (Fig. 2). The packing is shown in Fig. 3.

The potassium centres in (II) exhibit very different coordination geometries. Most of the K—O distances are slightly longer than the sum of the covalent radii (2.69 Å; Allen et al., 1987) but may be considered weak ionic bonds because of their directionality; other K—O interactions are considerably longer. Atom K1 is seven-coordinate, with an approximately pentagonal-bipyramidal coordination geometry. Atoms O2, from a dimethylformamide molecule, and O21, from a phenylphosphonate ligand, occupy the apical positions. Atoms O12 and O13 from a chelating phenylphosphonate ligand, O2(1 − x, y − 1/2, 1/2 − z) from a symmetry-related dimethylformamide molecule, O1 from a bridging water molecule, and O22(1 − x, 1 − y, 1 − z), a bridging O atom from a symmetry-related phenylphosphonate ligand, complete the equatorial positions. The K1—O distances range from 2.739 (2)– 2.932 (2) Å, in agreement with the average K—O distance for KO7 moieties in the Cambridge Structural Database [CSD; 2.80 (11) Å for 446 observations; Allen, 2002]. The next longest (non-bonded) interaction is 3.544 (4) Å for K1···O1ii [symmetry code: (ii) 1 − x, 1 − y, 1 − z].

Atom K2 is six-coordinate, with atoms O12 and O11iv from two different phenylphosphinate ligands, O22iii and O23iii from a chelating phenylphosphinate ligand, and O1iii and O2iv from bridging water and dimethylformamide molecules, respectively, making up the primary coordination environment [symmetry codes: (iii) 1 − x, 1/2 + y, 1/2-zi; (iv) 1 − x, y − 1/2, 1/2 − z]. The geometry is far from regular octahedral, because of the small bite angle of the chelating phenylphosphonate; the O22iii—K2—O23iii angle is 52.46 (6)\%. The K2—O distances range from 2.650 (2)–2.821 (2) Å, similar to the average for KO6 groups found in the CSD [2.80 (9) Å for 1506 observations]. The next longest K2···O non-bonded interaction is to atom O11, at 3.491 (4) Å. The closest distance between the K atoms is 3.9769 (15) Å [K1—K2v; symmetry code: (v) x, 1/2 − y, 1/2 + z].

The geometries of the phenylphosphonate ligands are very similar, both forming similar bonds via their O atoms to the K atoms, creating a system of bridges between the metal atoms that extends in the crystal in two dimensions. Each of the two phenylphosphinate ligands exhibits three different P—O distances, with one long distance – associated with bond to the hydroxy group – and two much shorter distances, the slightly longer of which can be attributed to the bond to the anionic O atom and the other to the doubly bonded O atom. The small differences [0.022 (3) and 0.020 (3) Å for atoms P1 and P2, respectively] between the bonds to the anionic (P—O1) and doubly bonded O atoms (P—O2) is common for phosphonate ligands bound to metal centres. The median difference for similar phosphonates in the CSD is 0.016 Å (86 observations). The two ligands bind in the same fashion to the potassium centres, chelating one metal centre via the hydroxy and anion O atoms (the latter also forms a bifurcated bond to another metal centre), and forming a bond between the doubly bound O atom and another metal centre.

The water molecules form symmetric bridges between atoms K1 and K2, with additional hydrogen-bond interactions to atoms O21 and O11. The O atom of the dimethylformamide molecule exhibits interactions to three K atoms, with a closer interaction to K2 and two longer distances to K1. A hydrogen bond from the C1/H1 group to atom O22(1 − x, 2 − y, 1 − z) of a neighbouring phosphonate group is also observed.

Experimental top

Compound (1) was synthesized by dissolving K2CO3 (0.200 g, 1.447 mmol) in distilled water (30 ml) and then adding phenylphosphinic acid (0.411 g, 2.892 mmol). To the clear and colourless solution, hydrogen peroxide (10%, 10 ml) was added and the solution was refluxed for 2 h. The water was removed under vacuum to give a white powder (yield 0.447 g, 78.9%). Caution: concentrated hydrogen peroxide is explosive in the presence of bases. Crystals of (II) were formed by the slow evaporation of a solution of (I) in a mixture of dimethylformamide and water (1:1, v/v) in a desiccator. Analysis found: C 36.73, H 4.80, N 2.68%; calculated: C 37.26, H 4.38, N 2.90%.

Refinement top

All H atoms were located in a difference Fourier map. Phenyl H atoms were placed at idealized positions, with C—H distances of 0.95 Å, and refined using a riding model, with Uiso(H) values of 1.2Ueq(C). Methyl H atoms were positioned by a best fit to the Fourier peaks, with C—H distances of 0.98 Å, and refined as idealized rigid groups allowed to rotate but not tip [Uiso(H) = 1.5Ueq(C)]. Aldehyde atom H1 was refined freely with Uiso(H) values of 1.2Ueq(C), and the hydroxy and water H atoms were refined freely with Uiso(H) values of 1.5Ueq(O).

Computing details top

Data collection: Collect (Nonius, 2000); cell refinement: HKL SCALEPACK (Otwinowski & Minor, 1997); data reduction: HKL DENZO (Otwinowski & Minor, 1997) and SCALEPACK; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).

Figures top
[Figure 1] Fig. 1. An ORTEP-3 (Farrugia, 1997) representation (50% probability displacement ellipsoids) of the asymmetric unit of (II), showing the coordination geometry around the K atoms. Further residues are included to complete the coordination spheres but are simplified for clarity. [Symmetry codes: (i) 1 − x, 2 − y, 1 − z; (ii) 1 − x, 1 − y, 1 − z; (iii) 1 − x, 1/2 + y, 1/2 − z; (iv) 1 − x, y − 1/2, 1/2 − z.
[Figure 2] Fig. 2. A view of the two-dimensional net in (II), showing hydrogen bonding between the phenylphosphonate ligands and dimethylformamide and water molecules. The vertical direction is parallel to the b axis and the horizontal is parallel to the c axis. Phenyl C atoms are shown as lines.
[Figure 3] Fig. 3. A view (a) perpendicular and (b) parallel to the bc plane of the polymeric structure of (II). Phenyl C atoms are shown as lines.
poly[µ2-aqua-m3-dimethylformide-bis(µ3-phenylphosphonato)dipotassium] top
Crystal data top
[K2(C3H7NO)(C6H6O3P)2(H2O)]F(000) = 1000
Mr = 483.47Dx = 1.52 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 16207 reflections
a = 16.988 (5) Åθ = 0.4–26.0°
b = 8.264 (5) ŵ = 0.64 mm1
c = 16.684 (5) ÅT = 153 K
β = 115.545 (5)°Plate, colorless
V = 2113.3 (16) Å30.14 × 0.12 × 0.08 mm
Z = 4
Data collection top
Nonius KappaCCD
diffractometer
4152 independent reflections
Radiation source: Enraf–Nonius FR5902927 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.082
ϕ or ω scans?θmax = 26.0°, θmin = 2.5°
Absorption correction: multi-scan
(Blessing, 1995)
h = 2020
Tmin = 0.901, Tmax = 0.951k = 1010
25724 measured reflectionsl = 2018
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.044Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.116H atoms treated by a mixture of independent and constrained refinement
S = 1.06 w = 1/[σ2(Fo2) + (0.0612P)2]
where P = (Fo2 + 2Fc2)/3
4152 reflections(Δ/σ)max = 0.001
270 parametersΔρmax = 0.33 e Å3
0 restraintsΔρmin = 0.45 e Å3
Crystal data top
[K2(C3H7NO)(C6H6O3P)2(H2O)]V = 2113.3 (16) Å3
Mr = 483.47Z = 4
Monoclinic, P21/cMo Kα radiation
a = 16.988 (5) ŵ = 0.64 mm1
b = 8.264 (5) ÅT = 153 K
c = 16.684 (5) Å0.14 × 0.12 × 0.08 mm
β = 115.545 (5)°
Data collection top
Nonius KappaCCD
diffractometer
4152 independent reflections
Absorption correction: multi-scan
(Blessing, 1995)
2927 reflections with I > 2σ(I)
Tmin = 0.901, Tmax = 0.951Rint = 0.082
25724 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0440 restraints
wR(F2) = 0.116H atoms treated by a mixture of independent and constrained refinement
S = 1.06Δρmax = 0.33 e Å3
4152 reflectionsΔρmin = 0.45 e Å3
270 parameters
Special details top

Experimental. Differential scanning calorimetry was performed with samples encapsulated in aluminium pans on a Perkin-Elmer Pyris Diamond with two successive and identical heat/cool cycles under N2 atmosphere from 10 °C to 350 °C at heating/cooling rates of 20 °C/min and 1 min ute isotherms 10 °C or 350 °C.

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
K10.48393 (4)0.76680 (8)0.44990 (4)0.02563 (18)
K20.51287 (4)0.75630 (8)0.19922 (4)0.02463 (18)
O10.56423 (15)0.5064 (3)0.41519 (15)0.0301 (5)
H1A0.593 (2)0.530 (4)0.388 (2)0.045*
H1B0.600 (2)0.488 (4)0.469 (2)0.045*
P10.33805 (5)0.91344 (9)0.24331 (5)0.0218 (2)
O110.36536 (13)1.0483 (2)0.20149 (12)0.0266 (5)
O120.39210 (13)0.7605 (2)0.26240 (12)0.0237 (5)
O130.33949 (13)0.9678 (3)0.33459 (12)0.0256 (5)
H13A0.345 (2)1.075 (4)0.349 (2)0.038*
P20.32654 (5)0.41668 (9)0.34859 (5)0.02073 (19)
O210.34161 (13)0.5556 (2)0.41123 (12)0.0245 (5)
O220.37650 (12)0.2624 (2)0.38732 (12)0.0223 (4)
O230.34709 (13)0.4659 (3)0.26816 (12)0.0227 (5)
H23A0.354 (2)0.581 (4)0.2584 (19)0.034*
O20.58219 (14)1.0514 (3)0.44093 (14)0.0330 (5)
C10.6599 (2)1.0863 (4)0.4900 (2)0.0312 (7)
H10.678 (2)1.189 (4)0.523 (2)0.037*
N0.72794 (17)0.9940 (3)0.50084 (16)0.0296 (6)
C20.7170 (2)0.8421 (4)0.4539 (2)0.0411 (9)
H2A0.71630.75290.49220.062*
H2B0.76550.82690.43760.062*
H2C0.66190.84370.39990.062*
C50.8147 (2)1.0357 (5)0.5668 (2)0.0478 (9)
H5A0.81281.14030.59360.072*
H5B0.85441.04290.53830.072*
H5C0.83550.95220.6130.072*
C110.22678 (19)0.8596 (3)0.17227 (18)0.0233 (6)
C120.1865 (2)0.9167 (4)0.08473 (19)0.0303 (7)
H120.2170.98880.06370.036*
C130.1026 (2)0.8686 (4)0.0287 (2)0.0358 (8)
H130.07560.90950.03030.043*
C140.0577 (2)0.7617 (4)0.0575 (2)0.0350 (8)
H140.00030.72850.01850.042*
C150.0970 (2)0.7035 (4)0.1436 (2)0.0317 (7)
H150.06670.62890.16350.038*
C160.1801 (2)0.7528 (3)0.2009 (2)0.0257 (7)
H160.20580.7140.26030.031*
C210.21195 (19)0.3656 (3)0.29914 (18)0.0221 (6)
C220.1563 (2)0.4214 (3)0.33420 (19)0.0270 (7)
H220.17790.49360.38330.032*
C230.0697 (2)0.3732 (4)0.2985 (2)0.0324 (7)
H230.03220.41270.3230.039*
C240.0376 (2)0.2671 (4)0.2266 (2)0.0329 (8)
H240.02170.23360.20220.04*
C250.0923 (2)0.2106 (4)0.1911 (2)0.0309 (7)
H250.07060.13820.14210.037*
C260.1786 (2)0.2594 (3)0.22680 (19)0.0252 (7)
H260.21570.22030.20180.03*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
K10.0268 (4)0.0235 (4)0.0234 (3)0.0002 (3)0.0077 (3)0.0020 (3)
K20.0245 (4)0.0237 (4)0.0269 (3)0.0020 (3)0.0121 (3)0.0034 (3)
O10.0280 (13)0.0362 (14)0.0256 (11)0.0019 (10)0.0109 (10)0.0030 (10)
P10.0257 (4)0.0181 (4)0.0214 (4)0.0020 (3)0.0099 (3)0.0005 (3)
O110.0341 (12)0.0208 (11)0.0245 (10)0.0076 (9)0.0124 (9)0.0004 (8)
O120.0237 (11)0.0207 (11)0.0267 (11)0.0011 (9)0.0109 (9)0.0003 (8)
O130.0358 (13)0.0209 (11)0.0210 (10)0.0028 (10)0.0134 (9)0.0008 (9)
P20.0229 (4)0.0177 (4)0.0209 (4)0.0003 (3)0.0088 (3)0.0002 (3)
O210.0291 (12)0.0208 (11)0.0247 (10)0.0012 (9)0.0125 (9)0.0027 (8)
O220.0235 (11)0.0185 (11)0.0230 (10)0.0021 (8)0.0083 (9)0.0007 (8)
O230.0287 (12)0.0185 (11)0.0223 (10)0.0014 (9)0.0122 (9)0.0000 (8)
O20.0291 (14)0.0327 (13)0.0329 (12)0.0016 (10)0.0094 (10)0.0047 (10)
C10.039 (2)0.0251 (18)0.0335 (18)0.0027 (16)0.0195 (16)0.0037 (14)
N0.0311 (16)0.0264 (15)0.0332 (14)0.0001 (12)0.0157 (12)0.0001 (11)
C20.050 (2)0.0309 (19)0.045 (2)0.0056 (17)0.0229 (18)0.0052 (16)
C50.034 (2)0.048 (2)0.056 (2)0.0040 (18)0.0149 (18)0.0003 (18)
C110.0264 (17)0.0190 (15)0.0246 (15)0.0024 (13)0.0109 (13)0.0007 (12)
C120.0307 (18)0.0301 (18)0.0277 (16)0.0020 (14)0.0101 (14)0.0022 (13)
C130.034 (2)0.043 (2)0.0226 (15)0.0032 (16)0.0050 (14)0.0007 (14)
C140.0235 (17)0.040 (2)0.0333 (17)0.0079 (15)0.0042 (14)0.0048 (15)
C150.0255 (18)0.0311 (18)0.0385 (18)0.0019 (14)0.0137 (15)0.0014 (14)
C160.0263 (17)0.0241 (17)0.0274 (15)0.0012 (13)0.0123 (13)0.0020 (13)
C210.0248 (17)0.0181 (15)0.0232 (15)0.0024 (12)0.0102 (13)0.0044 (12)
C220.0315 (18)0.0192 (16)0.0310 (16)0.0008 (13)0.0141 (14)0.0007 (12)
C230.0303 (19)0.0267 (18)0.0450 (19)0.0010 (14)0.0207 (16)0.0022 (15)
C240.0237 (17)0.0301 (18)0.0425 (19)0.0025 (14)0.0120 (15)0.0013 (15)
C250.0281 (18)0.0307 (18)0.0294 (16)0.0002 (14)0.0081 (14)0.0014 (13)
C260.0254 (17)0.0259 (17)0.0234 (15)0.0024 (13)0.0097 (13)0.0018 (12)
Geometric parameters (Å, º) top
K1—O12.740 (3)C2—H2B0.98
K1—O22.925 (3)C2—H2C0.98
K1—O2i2.932 (2)C5—H5A0.98
K1—O122.831 (2)C5—H5B0.98
K1—O132.900 (2)C5—H5C0.98
K1—O212.822 (2)C11—C161.401 (4)
K1—O22ii2.739 (2)C11—C121.401 (4)
K2—O1iii2.734 (2)C12—C131.384 (4)
K2—O2iv2.772 (2)C12—H120.95
K2—O11iv2.650 (2)C13—C141.383 (5)
K2—O122.681 (2)C13—H130.95
K2—O22iii2.821 (2)C14—C151.383 (4)
K2—O23iii2.800 (2)C14—H140.95
O1—H1A0.82 (4)C15—C161.382 (4)
O1—H1B0.85 (3)C15—H150.95
P1—O111.491 (2)C16—H160.95
P1—O121.513 (2)C21—C221.387 (4)
P1—O131.578 (2)C21—C261.399 (4)
P1—C111.801 (3)C22—C231.388 (4)
O13—H13A0.92 (3)C22—H220.95
P2—O211.499 (2)C23—C241.393 (4)
P2—O221.513 (2)C23—H230.95
P2—O231.579 (2)C24—C251.381 (4)
P2—C211.806 (3)C24—H240.95
O23—H23A0.98 (3)C25—C261.383 (4)
O2—C11.250 (4)C25—H250.95
C1—N1.331 (4)C26—H260.95
C1—H10.99 (3)K1—K1i4.143 (3)
N—C51.450 (4)K1—K2v3.9769 (15)
N—C21.449 (4)K2—K2iv4.558 (2)
C2—H2A0.98
O22ii—K1—O180.99 (6)K1ii—O22—K2iv91.32 (7)
O22ii—K1—O21117.53 (6)P2—O23—K2iv98.97 (10)
O1—K1—O2185.50 (7)P2—O23—H23A118.4 (17)
O22ii—K1—O12157.37 (6)K2iv—O23—H23A118.9 (18)
O1—K1—O1280.76 (6)C1—O2—K2iii118.57 (19)
O21—K1—O1274.12 (6)C1—O2—K1128.03 (19)
O22ii—K1—O13146.23 (6)K2iii—O2—K1113.36 (8)
O1—K1—O13131.73 (7)C1—O2—K1i93.12 (19)
O21—K1—O1378.82 (7)K2iii—O2—K1i88.35 (7)
O12—K1—O1351.10 (6)K1—O2—K1i90.02 (7)
O22ii—K1—O281.52 (6)O2—C1—N124.6 (3)
O1—K1—O2105.88 (8)O2—C1—H1123.5 (19)
O21—K1—O2159.58 (6)N—C1—H1111.8 (19)
O12—K1—O290.73 (6)C1—N—C5120.4 (3)
O13—K1—O281.00 (7)C1—N—C2121.4 (3)
O22ii—K1—O2i80.15 (6)C5—N—C2117.9 (3)
O1—K1—O2i153.18 (7)N—C2—H2A109.5
O21—K1—O2i86.50 (7)N—C2—H2B109.5
O12—K1—O2i121.30 (6)H2A—C2—H2B109.5
O13—K1—O2i71.18 (6)N—C2—H2C109.5
O2—K1—O2i89.98 (7)H2A—C2—H2C109.5
O11iv—K2—O12106.63 (6)H2B—C2—H2C109.5
O11iv—K2—O1iii159.49 (7)N—C5—H5A109.5
O12—K2—O1iii92.70 (7)N—C5—H5B109.5
O11iv—K2—O2iv98.34 (7)H5A—C5—H5B109.5
O12—K2—O2iv94.21 (7)N—C5—H5C109.5
O1iii—K2—O2iv86.75 (8)H5A—C5—H5C109.5
O11iv—K2—O23iii84.90 (7)H5B—C5—H5C109.5
O12—K2—O23iii130.21 (6)C16—C11—C12118.3 (3)
O1iii—K2—O23iii77.24 (7)C16—C11—P1121.2 (2)
O2iv—K2—O23iii132.76 (6)C12—C11—P1120.3 (2)
O11iv—K2—O22iii79.56 (6)C13—C12—C11120.4 (3)
O12—K2—O22iii173.05 (6)C13—C12—H12119.8
O1iii—K2—O22iii81.57 (6)C11—C12—H12119.8
O2iv—K2—O22iii81.58 (6)C14—C13—C12120.7 (3)
O23iii—K2—O22iii52.46 (6)C14—C13—H13119.7
K2iv—O1—K1127.52 (9)C12—C13—H13119.7
K2iv—O1—H1A91 (3)C13—C14—C15119.4 (3)
K1—O1—H1A114 (3)C13—C14—H14120.3
K2iv—O1—H1B121 (2)C15—C14—H14120.3
K1—O1—H1B96 (2)C16—C15—C14120.5 (3)
H1A—O1—H1B108 (3)C16—C15—H15119.7
O11—P1—O12116.09 (12)C14—C15—H15119.7
O11—P1—O13111.11 (12)C15—C16—C11120.6 (3)
O12—P1—O13106.22 (11)C15—C16—H16119.7
O11—P1—C11109.07 (13)C11—C16—H16119.7
O12—P1—C11107.56 (12)C22—C21—C26118.4 (3)
O13—P1—C11106.30 (12)C22—C21—P2121.7 (2)
P1—O11—K2iii120.58 (10)C26—C21—P2119.8 (2)
P1—O12—K2115.22 (10)C21—C22—C23120.9 (3)
P1—O12—K1102.28 (9)C21—C22—H22119.6
K2—O12—K1106.52 (7)C23—C22—H22119.6
P1—O13—K197.67 (10)C22—C23—C24120.0 (3)
P1—O13—H13A119.3 (19)C22—C23—H23120
K1—O13—H13A114 (2)C24—C23—H23120
O21—P2—O22116.87 (11)C25—C24—C23119.7 (3)
O21—P2—O23111.18 (11)C25—C24—H24120.1
O22—P2—O23106.94 (11)C23—C24—H24120.1
O21—P2—C21108.90 (12)C24—C25—C26120.0 (3)
O22—P2—C21107.08 (12)C24—C25—H25120
O23—P2—C21105.18 (12)C26—C25—H25120
P2—O21—K1120.35 (10)C25—C26—C21121.0 (3)
P2—O22—K1ii125.73 (10)C25—C26—H26119.5
P2—O22—K2iv99.86 (9)C21—C26—H26119.5
O22ii—K1—O1—K2iv148.83 (11)O23—P2—O22—K2iv12.39 (11)
O21—K1—O1—K2iv30.01 (11)C21—P2—O22—K2iv124.72 (10)
O12—K1—O1—K2iv44.61 (10)O21—P2—O23—K2iv116.22 (11)
O13—K1—O1—K2iv40.67 (15)O22—P2—O23—K2iv12.45 (11)
O2—K1—O1—K2iv132.73 (10)C21—P2—O23—K2iv126.07 (11)
O2i—K1—O1—K2iv103.06 (16)O22ii—K1—O2—C113.9 (2)
O12—P1—O11—K2iii86.07 (14)O1—K1—O2—C164.1 (3)
O13—P1—O11—K2iii35.43 (16)O21—K1—O2—C1173.8 (2)
C11—P1—O11—K2iii152.28 (12)O12—K1—O2—C1144.7 (2)
O11—P1—O12—K26.79 (15)O13—K1—O2—C1164.9 (3)
O13—P1—O12—K2130.85 (11)O2i—K1—O2—C194.0 (3)
C11—P1—O12—K2115.65 (12)O22ii—K1—O2—K2iii168.26 (8)
O11—P1—O12—K1108.30 (11)O1—K1—O2—K2iii113.69 (8)
O13—P1—O12—K115.76 (12)O21—K1—O2—K2iii8.3 (2)
C11—P1—O12—K1129.25 (11)O12—K1—O2—K2iii33.10 (8)
O11iv—K2—O12—P1155.80 (10)O13—K1—O2—K2iii17.27 (7)
O1iii—K2—O12—P117.26 (12)O2i—K1—O2—K2iii88.21 (8)
O2iv—K2—O12—P1104.19 (12)O22ii—K1—O2—K1i80.05 (6)
O23iii—K2—O12—P158.28 (14)O1—K1—O2—K1i158.09 (6)
O11iv—K2—O12—K143.17 (8)O21—K1—O2—K1i79.88 (17)
O1iii—K2—O12—K1129.89 (7)O12—K1—O2—K1i121.31 (6)
O2iv—K2—O12—K1143.18 (7)O13—K1—O2—K1i70.94 (6)
O23iii—K2—O12—K154.35 (10)O2i—K1—O2—K1i0
O22ii—K1—O12—P1136.66 (14)K2iii—O2—C1—N118.9 (3)
O1—K1—O12—P1173.27 (10)K1—O2—C1—N58.9 (4)
O21—K1—O12—P198.82 (10)K1i—O2—C1—N151.3 (3)
O13—K1—O12—P110.51 (8)O2—C1—N—C5173.0 (3)
O2—K1—O12—P167.29 (10)O2—C1—N—C21.1 (5)
O2i—K1—O12—P123.14 (12)O11—P1—C11—C16170.6 (2)
O22ii—K1—O12—K215.37 (18)O12—P1—C11—C1662.8 (3)
O1—K1—O12—K251.98 (7)O13—P1—C11—C1650.7 (3)
O21—K1—O12—K2139.89 (8)O11—P1—C11—C1213.2 (3)
O13—K1—O12—K2131.79 (9)O12—P1—C11—C12113.4 (2)
O2—K1—O12—K253.99 (7)O13—P1—C11—C12133.1 (2)
O2i—K1—O12—K2144.42 (7)C16—C11—C12—C130.3 (4)
O11—P1—O13—K1111.95 (11)P1—C11—C12—C13176.6 (3)
O12—P1—O13—K115.15 (11)C11—C12—C13—C141.1 (5)
C11—P1—O13—K1129.52 (11)C12—C13—C14—C150.5 (5)
O22ii—K1—O13—P1148.03 (10)C13—C14—C15—C160.8 (5)
O1—K1—O13—P114.92 (14)C14—C15—C16—C111.6 (5)
O21—K1—O13—P188.45 (10)C12—C11—C16—C151.0 (4)
O12—K1—O13—P19.93 (8)P1—C11—C16—C15175.3 (2)
O2—K1—O13—P188.38 (10)O21—P2—C21—C2215.3 (3)
O2i—K1—O13—P1178.54 (11)O22—P2—C21—C22112.0 (2)
O22—P2—O21—K184.59 (14)O23—P2—C21—C22134.5 (2)
O23—P2—O21—K138.54 (15)O21—P2—C21—C26168.6 (2)
C21—P2—O21—K1153.97 (11)O22—P2—C21—C2664.2 (2)
O22ii—K1—O21—P2105.53 (12)O23—P2—C21—C2649.4 (3)
O1—K1—O21—P228.13 (12)C26—C21—C22—C230.0 (4)
O12—K1—O21—P253.52 (11)P2—C21—C22—C23176.2 (2)
O13—K1—O21—P2105.98 (12)C21—C22—C23—C240.2 (5)
O2—K1—O21—P297.0 (2)C22—C23—C24—C250.2 (5)
O2i—K1—O21—P2177.48 (12)C23—C24—C25—C260.0 (5)
O21—P2—O22—K1ii14.06 (17)C24—C25—C26—C210.2 (4)
O23—P2—O22—K1ii111.23 (13)C22—C21—C26—C250.2 (4)
C21—P2—O22—K1ii136.44 (13)P2—C21—C26—C25176.0 (2)
O21—P2—O22—K2iv112.90 (11)
Symmetry codes: (i) x+1, y+2, z+1; (ii) x+1, y+1, z+1; (iii) x+1, y+1/2, z+1/2; (iv) x+1, y1/2, z+1/2; (v) x, y+3/2, z+1/2.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H1A···O11iv0.82 (4)1.91 (4)2.711 (3)164 (4)
O1—H1B···O21ii0.85 (3)1.85 (4)2.686 (3)169 (3)
O13—H13A···O22vi0.92 (3)1.67 (3)2.573 (3)169 (3)
O23—H23A···O120.98 (3)1.61 (3)2.566 (3)164 (3)
C1—H1···O21i0.99 (3)2.47 (3)3.393 (4)156 (3)
Symmetry codes: (i) x+1, y+2, z+1; (ii) x+1, y+1, z+1; (iv) x+1, y1/2, z+1/2; (vi) x, y+1, z.

Experimental details

Crystal data
Chemical formula[K2(C3H7NO)(C6H6O3P)2(H2O)]
Mr483.47
Crystal system, space groupMonoclinic, P21/c
Temperature (K)153
a, b, c (Å)16.988 (5), 8.264 (5), 16.684 (5)
β (°) 115.545 (5)
V3)2113.3 (16)
Z4
Radiation typeMo Kα
µ (mm1)0.64
Crystal size (mm)0.14 × 0.12 × 0.08
Data collection
DiffractometerNonius KappaCCD
diffractometer
Absorption correctionMulti-scan
(Blessing, 1995)
Tmin, Tmax0.901, 0.951
No. of measured, independent and
observed [I > 2σ(I)] reflections
25724, 4152, 2927
Rint0.082
(sin θ/λ)max1)0.617
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.044, 0.116, 1.06
No. of reflections4152
No. of parameters270
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.33, 0.45

Computer programs: Collect (Nonius, 2000), HKL SCALEPACK (Otwinowski & Minor, 1997), HKL DENZO (Otwinowski & Minor, 1997) and SCALEPACK, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).

Selected geometric parameters (Å, º) top
K1—O12.740 (3)P1—O121.513 (2)
K1—O22.925 (3)P1—O131.578 (2)
K1—O2i2.932 (2)O13—H13A0.92 (3)
K1—O122.831 (2)P2—O211.499 (2)
K1—O132.900 (2)P2—O221.513 (2)
K1—O212.822 (2)P2—O231.579 (2)
K1—O22ii2.739 (2)O2—C11.250 (4)
K2—O1iii2.734 (2)C1—N1.331 (4)
K2—O2iv2.772 (2)N—C51.450 (4)
K2—O11iv2.650 (2)N—C21.449 (4)
K2—O122.681 (2)K1—K1i4.143 (3)
K2—O22iii2.821 (2)K1—K2v3.9769 (15)
K2—O23iii2.800 (2)K2—K2iv4.558 (2)
P1—O111.491 (2)
H1A—O1—H1B108 (3)O21—P2—O22116.87 (11)
O11—P1—O12116.09 (12)O21—P2—O23111.18 (11)
O11—P1—O13111.11 (12)O22—P2—O23106.94 (11)
O12—P1—O13106.22 (11)
Symmetry codes: (i) x+1, y+2, z+1; (ii) x+1, y+1, z+1; (iii) x+1, y+1/2, z+1/2; (iv) x+1, y1/2, z+1/2; (v) x, y+3/2, z+1/2.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O1—H1A···O11iv0.82 (4)1.91 (4)2.711 (3)164 (4)
O1—H1B···O21ii0.85 (3)1.85 (4)2.686 (3)169 (3)
O13—H13A···O22vi0.92 (3)1.67 (3)2.573 (3)169 (3)
O23—H23A···O120.98 (3)1.61 (3)2.566 (3)164 (3)
C1—H1···O21i0.99 (3)2.47 (3)3.393 (4)156 (3)
Symmetry codes: (i) x+1, y+2, z+1; (ii) x+1, y+1, z+1; (iv) x+1, y1/2, z+1/2; (vi) x, y+1, z.
 

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