The title complex, [La(C2H5NO2)3(H2O)2]Cl3·H2O or [La(gly)3(H2O)2]Cl3·H2O, is a one-dimensional coordination polymer. Its basic repeat unit contains three glycine molecules in the zwitterion form and two coordinated water molecules. Three carboxyl moieties of the three glycine molecules serve as bridging groups, which connect the neighbouring LaIII ions. The coordination number of lanthanum is nine. Intermolecular hydrogen bonds, involving water molecules and chloride ions, form a three-dimensional network.
Supporting information
CCDC reference: 103381
Key indicators
- Single-crystal X-ray study
- T = 293 K
- Mean (C-C) = 0.006 Å
- R factor = 0.032
- wR factor = 0.086
- Data-to-parameter ratio = 16.2
checkCIF results
No syntax errors found
ADDSYM reports no extra symmetry
General Notes
REFLT_03
From the CIF: _diffrn_reflns_theta_max 25.00
From the CIF: _reflns_number_total 3168
Count of symmetry unique reflns 1895
Completeness (_total/calc) 167.18%
TEST3: Check Friedels for noncentro structure
Estimate of Friedel pairs measured 1273
Fraction of Friedel pairs measured 0.672
Are heavy atom types Z>Si present yes
Please check that the estimate of the number of Friedel pairs is
correct. If it is not, please give the correct count in the
_publ_section_exptl_refinement section of the submitted CIF.
All chemicals were of reagent grade and were used without further purification.
The title complex was prepared based on phase equilibrium data.
LaCl3·6H2O and glycinic acid are dissolved in water (molar ratio 1:
3), the colourless crystals of (I) were obtained by slow evaporation of the
above aqueous solution (pH = 4–5) at room temperature. Its metal composition
was determined by titration with edta using xylenol orange as the end point
indicator.
The achiral title compound crystallizes in a chiral space group. All the H atoms
were placed in geometrically calculated positions, with N—H = 0.89 Å and
C—H = 0.97 Å (except for the water H atoms, which were found in difference
maps) and refined as riding atoms, with Uiso(H) =
1.2–1.5Ueq(parent atom).
Data collection: XSCANS (Siemens, 1994); cell refinement: XSCANS; data reduction: SHELXTL (Siemens, 1994); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
catena-Poly[[[diaqualanthanum(III)]-tri-µ-glycinato] trichloride
monohydrate]
top
Crystal data top
[La(C2H5NO2)3(H2O)2]Cl3·H2O | F(000) = 1032 |
Mr = 524.52 | Dx = 1.938 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 25 reflections |
a = 4.798 (1) Å | θ = 2.2–12.8° |
b = 12.094 (1) Å | µ = 2.86 mm−1 |
c = 30.974 (2) Å | T = 293 K |
V = 1797.3 (4) Å3 | Prism, colourless |
Z = 4 | 0.3 × 0.2 × 0.2 mm |
Data collection top
Siemens P4 diffractometer | 3145 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.074 |
Graphite monochromator | θmax = 25.0°, θmin = 1.3° |
ω scans | h = −5→5 |
Absorption correction: ψ scan (North et al., 1968) | k = 0→14 |
Tmin = 0.509, Tmax = 0.566 | l = 0→36 |
3172 measured reflections | 3 standard reflections every 100 reflections |
3168 independent reflections | intensity decay: 2.2% |
Refinement top
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.032 | H-atom parameters constrained |
wR(F2) = 0.086 | w = 1/[σ2(Fo2) + (0.01P)2 + 0.35P] where P = (Fo2 + 2Fc2)/3 |
S = 0.97 | (Δ/σ)max < 0.001 |
3172 reflections | Δρmax = 0.60 e Å−3 |
196 parameters | Δρmin = −0.74 e Å−3 |
0 restraints | Absolute structure: (Flack, 1983), 1274 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.0012 (2) |
Crystal data top
[La(C2H5NO2)3(H2O)2]Cl3·H2O | V = 1797.3 (4) Å3 |
Mr = 524.52 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 4.798 (1) Å | µ = 2.86 mm−1 |
b = 12.094 (1) Å | T = 293 K |
c = 30.974 (2) Å | 0.3 × 0.2 × 0.2 mm |
Data collection top
Siemens P4 diffractometer | 3145 reflections with I > 2σ(I) |
Absorption correction: ψ scan (North et al., 1968) | Rint = 0.074 |
Tmin = 0.509, Tmax = 0.566 | 3 standard reflections every 100 reflections |
3172 measured reflections | intensity decay: 2.2% |
3168 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.032 | H-atom parameters constrained |
wR(F2) = 0.086 | Δρmax = 0.60 e Å−3 |
S = 0.97 | Δρmin = −0.74 e Å−3 |
3172 reflections | Absolute structure: (Flack, 1983), 1274 Friedel pairs |
196 parameters | Absolute structure parameter: 0.0012 (2) |
0 restraints | |
Special details top
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 | x | y | z | Uiso*/Ueq | |
La1 | 0.51428 (5) | 0.836846 (18) | 0.621733 (7) | 0.01291 (5) | |
C1 | 0.0107 (12) | 0.7847 (4) | 0.70260 (14) | 0.0221 (2) | |
C2 | −0.0368 (12) | 0.7659 (4) | 0.75082 (14) | 0.0222 (3) | |
H2A | 0.0762 | 0.7046 | 0.7609 | 0.027* | |
H2B | 0.0147 | 0.8315 | 0.7670 | 0.027* | |
C3 | 0.0098 (11) | 0.6395 (3) | 0.60684 (13) | 0.0199 (2) | |
C4 | −0.1170 (10) | 0.5296 (4) | 0.61807 (16) | 0.0205 (3) | |
H4A | −0.1963 | 0.4970 | 0.5922 | 0.025* | |
H4B | −0.2671 | 0.5409 | 0.6386 | 0.025* | |
C5 | −0.0753 (10) | 1.0132 (4) | 0.58891 (15) | 0.0194 (2) | |
C6 | 0.0924 (11) | 1.1141 (4) | 0.57406 (15) | 0.0219 (2) | |
H6A | 0.1985 | 1.1433 | 0.5982 | 0.026* | |
H6B | 0.2229 | 1.0921 | 0.5517 | 0.026* | |
N1 | −0.3374 (9) | 0.7410 (3) | 0.75718 (14) | 0.0219 (2) | |
H1A | −0.4102 | 0.7892 | 0.7757 | 0.033* | |
H1B | −0.3560 | 0.6728 | 0.7676 | 0.033* | |
H1C | −0.4260 | 0.7460 | 0.7320 | 0.033* | |
N2 | 0.0925 (9) | 0.4503 (3) | 0.63720 (12) | 0.0209 (4) | |
H2C | 0.2535 | 0.4563 | 0.6231 | 0.031* | |
H2D | 0.0288 | 0.3814 | 0.6348 | 0.031* | |
H2E | 0.1186 | 0.4664 | 0.6649 | 0.031* | |
N3 | −0.0928 (9) | 1.2001 (3) | 0.55727 (14) | 0.0232 (4) | |
H3A | −0.2072 | 1.1708 | 0.5378 | 0.035* | |
H3B | 0.0083 | 1.2532 | 0.5450 | 0.035* | |
H3C | −0.1922 | 1.2285 | 0.5788 | 0.035* | |
O1 | 0.2602 (8) | 0.8109 (3) | 0.69456 (11) | 0.0222 (3) | |
O2 | −0.1720 (8) | 0.7656 (3) | 0.67616 (10) | 0.0233 (4) | |
O3 | 0.2616 (7) | 0.6563 (3) | 0.61453 (10) | 0.0199 (3) | |
O4 | −0.1519 (7) | 0.7054 (3) | 0.58806 (11) | 0.0207 (4) | |
O5 | 0.0567 (7) | 0.9367 (3) | 0.60643 (10) | 0.0215 (3) | |
O6 | −0.3329 (7) | 1.0120 (3) | 0.58153 (10) | 0.0190 (4) | |
O7 | 0.5703 (9) | 1.0023 (3) | 0.67305 (11) | 0.0376 (6) | |
H7A | 0.5982 | 0.9791 | 0.6986 | 0.045* | |
H7B | 0.7089 | 1.0408 | 0.6649 | 0.045* | |
O8 | 0.4215 (7) | 0.8183 (3) | 0.53953 (10) | 0.0191 (6) | |
H8A | 0.5122 | 0.7531 | 0.5288 | 0.023* | |
H8B | 0.4936 | 0.8821 | 0.5249 | 0.023* | |
Cl3 | 0.3642 (3) | 0.75681 (10) | 0.85047 (4) | 0.0288 (3) | |
Cl2 | 0.8645 (3) | 0.12101 (11) | 0.45879 (4) | 0.0327 (3) | |
O9 | 0.9272 (7) | 0.8869 (3) | 0.49882 (11) | 0.0243 (9) | |
H9A | 1.0286 | 0.9393 | 0.5082 | 0.029* | |
H9B | 0.8343 | 0.9137 | 0.4779 | 0.029* | |
Cl1 | 0.5663 (4) | 0.00902 (12) | 0.77496 (5) | 0.0504 (5) | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
La1 | 0.01268 (10) | 0.01056 (10) | 0.01550 (11) | −0.00064 (11) | −0.00011 (11) | 0.00245 (9) |
C1 | 0.0260 (4) | 0.0237 (5) | 0.0165 (4) | −0.0015 (4) | 0.0004 (3) | 0.0023 (4) |
C2 | 0.0271 (5) | 0.0216 (5) | 0.0180 (4) | −0.0004 (5) | 0.0010 (4) | 0.0028 (5) |
C3 | 0.0237 (4) | 0.0156 (4) | 0.0205 (5) | −0.0039 (4) | −0.0036 (4) | 0.0003 (4) |
C4 | 0.0222 (5) | 0.0169 (4) | 0.0224 (6) | −0.0039 (4) | −0.0043 (5) | 0.0007 (5) |
C5 | 0.0232 (4) | 0.0148 (4) | 0.0201 (5) | 0.0061 (4) | 0.0021 (4) | 0.0027 (4) |
C6 | 0.0266 (4) | 0.0167 (4) | 0.0223 (4) | 0.0027 (4) | 0.0021 (4) | 0.0033 (4) |
N1 | 0.0266 (4) | 0.0167 (4) | 0.0223 (4) | 0.0027 (4) | 0.0021 (4) | 0.0033 (4) |
N2 | 0.0222 (8) | 0.0168 (6) | 0.0237 (8) | −0.0037 (6) | −0.0037 (7) | 0.0012 (6) |
N3 | 0.0284 (7) | 0.0152 (6) | 0.0260 (8) | 0.0027 (6) | 0.0019 (7) | 0.0034 (6) |
O1 | 0.0254 (5) | 0.0233 (6) | 0.0179 (4) | −0.0006 (6) | 0.0019 (4) | 0.0027 (5) |
O2 | 0.0266 (6) | 0.0243 (8) | 0.0190 (6) | −0.0006 (7) | −0.0012 (5) | 0.0013 (7) |
O3 | 0.0249 (5) | 0.0133 (4) | 0.0214 (6) | −0.0044 (4) | −0.0041 (6) | 0.0023 (4) |
O4 | 0.0246 (6) | 0.0181 (6) | 0.0196 (7) | −0.0023 (6) | −0.0022 (6) | 0.0017 (6) |
O5 | 0.0242 (5) | 0.0179 (5) | 0.0224 (6) | 0.0076 (5) | 0.0024 (5) | 0.0051 (5) |
O6 | 0.0227 (5) | 0.0143 (7) | 0.0198 (7) | 0.0059 (5) | 0.0025 (6) | 0.0009 (7) |
O7 | 0.0650 (14) | 0.0302 (8) | 0.0177 (9) | −0.0239 (10) | −0.0025 (10) | −0.0059 (6) |
O8 | 0.0310 (15) | 0.0085 (11) | 0.0179 (5) | −0.0022 (11) | −0.0008 (8) | −0.0019 (6) |
O9 | 0.024 (2) | 0.0201 (16) | 0.0292 (17) | −0.0022 (14) | −0.0053 (16) | −0.0011 (15) |
Cl1 | 0.0898 (13) | 0.0291 (7) | 0.0323 (7) | 0.0129 (9) | −0.0126 (9) | −0.0039 (6) |
Cl2 | 0.0433 (8) | 0.0222 (6) | 0.0325 (6) | 0.0103 (6) | −0.0069 (7) | −0.0009 (6) |
Cl3 | 0.0473 (8) | 0.0216 (6) | 0.0175 (5) | 0.0080 (6) | 0.0056 (6) | 0.0015 (5) |
Geometric parameters (Å, º) top
La1—O3 | 2.507 (3) | C5—O5 | 1.246 (6) |
La1—O5 | 2.550 (3) | C5—O6 | 1.257 (6) |
La1—O7 | 2.570 (4) | C5—C6 | 1.533 (7) |
La1—O1 | 2.583 (3) | C6—N3 | 1.463 (6) |
La1—O8 | 2.594 (3) | C6—H6A | 0.9700 |
La1—O6i | 2.565 (3) | C6—H6B | 0.9700 |
La1—O2i | 2.419 (4) | N1—H1A | 0.8900 |
La1—O4i | 2.486 (3) | N1—H1B | 0.8900 |
La1—O5i | 2.908 (4) | N1—H1C | 0.8900 |
C1—O2 | 1.222 (6) | N2—H2C | 0.8900 |
C1—O1 | 1.263 (7) | N2—H2D | 0.8900 |
C1—C2 | 1.528 (6) | N2—H2E | 0.8900 |
C2—N1 | 1.486 (7) | N3—H3A | 0.8900 |
C2—H2A | 0.9700 | N3—H3B | 0.8900 |
C2—H2B | 0.9700 | N3—H3C | 0.8900 |
C3—O3 | 1.248 (6) | O7—H7A | 0.8497 |
C3—O4 | 1.255 (6) | O7—H7B | 0.8501 |
C3—C4 | 1.503 (6) | O8—H8A | 0.9600 |
C4—N2 | 1.510 (6) | O8—H8B | 0.9600 |
C4—H4A | 0.9700 | O9—H9A | 0.8499 |
C4—H4B | 0.9700 | O9—H9B | 0.8499 |
| | | |
O2i—La1—O4i | 70.35 (12) | N1—C2—H2B | 110.2 |
O2i—La1—O3 | 93.03 (12) | C1—C2—H2B | 110.2 |
O4i—La1—O3 | 73.59 (11) | H2A—C2—H2B | 108.5 |
O2i—La1—O5 | 146.51 (11) | O3—C3—O4 | 125.7 (4) |
O4i—La1—O5 | 141.22 (10) | O3—C3—C4 | 119.4 (4) |
O3—La1—O5 | 88.82 (11) | O4—C3—C4 | 114.7 (4) |
O2i—La1—O6i | 117.05 (12) | C3—C4—N2 | 112.5 (4) |
O4i—La1—O6i | 98.06 (11) | C3—C4—H4A | 109.1 |
O3—La1—O6i | 144.53 (10) | N2—C4—H4A | 109.1 |
O5—La1—O6i | 76.40 (10) | C3—C4—H4B | 109.1 |
O2i—La1—O7 | 77.35 (13) | N2—C4—H4B | 109.1 |
O4i—La1—O7 | 133.63 (13) | H4A—C4—H4B | 107.8 |
O3—La1—O7 | 141.60 (12) | O5—C5—O6 | 124.8 (5) |
O5—La1—O7 | 80.58 (12) | O5—C5—C6 | 117.1 (4) |
O6i—La1—O7 | 68.11 (11) | O6—C5—C6 | 118.0 (4) |
O2i—La1—O1 | 69.01 (12) | N3—C6—C5 | 110.7 (4) |
O4i—La1—O1 | 126.36 (11) | N3—C6—H6A | 109.5 |
O3—La1—O1 | 75.17 (11) | C5—C6—H6A | 109.5 |
O5—La1—O1 | 79.25 (11) | N3—C6—H6B | 109.5 |
O6i—La1—O1 | 131.23 (11) | C5—C6—H6B | 109.5 |
O7—La1—O1 | 66.64 (12) | H6A—C6—H6B | 108.1 |
O2i—La1—O8 | 139.47 (11) | C2—N1—H1A | 109.5 |
O4i—La1—O8 | 69.12 (11) | C2—N1—H1B | 109.5 |
O3—La1—O8 | 75.78 (10) | H1A—N1—H1B | 109.5 |
O5—La1—O8 | 73.19 (10) | C2—N1—H1C | 109.5 |
O6i—La1—O8 | 69.14 (10) | H1A—N1—H1C | 109.5 |
O7—La1—O8 | 133.81 (11) | H1B—N1—H1C | 109.5 |
O1—La1—O8 | 139.96 (11) | C4—N2—H2C | 109.5 |
O2i—La1—O5i | 72.80 (11) | C4—N2—H2D | 109.5 |
O4i—La1—O5i | 67.69 (10) | H2C—N2—H2D | 109.5 |
O3—La1—O5i | 141.24 (10) | C4—N2—H2E | 109.5 |
O5—La1—O5i | 122.94 (12) | H2C—N2—H2E | 109.5 |
O6i—La1—O5i | 47.31 (10) | H2D—N2—H2E | 109.5 |
O7—La1—O5i | 71.58 (12) | C6—N3—H3A | 109.5 |
O1—La1—O5i | 127.95 (10) | C6—N3—H3B | 109.5 |
O8—La1—O5i | 91.69 (10) | H3A—N3—H3B | 109.5 |
O2i—La1—C5i | 94.52 (13) | C6—N3—H3C | 109.5 |
O4i—La1—C5i | 83.80 (12) | H3A—N3—H3C | 109.5 |
O3—La1—C5i | 152.12 (11) | H3B—N3—H3C | 109.5 |
O5—La1—C5i | 99.30 (11) | C1—O1—La1 | 130.5 (3) |
O6i—La1—C5i | 23.60 (12) | C3—O3—La1 | 128.8 (3) |
O7—La1—C5i | 66.27 (12) | H8A—O8—H8B | 109.5 |
O1—La1—C5i | 132.44 (12) | H9A—O9—H9B | 106.0 |
O8—La1—C5i | 81.11 (11) | La1—O7—H7A | 109.6 |
O5i—La1—C5i | 23.82 (11) | La1—O7—H7B | 109.0 |
O2—C1—O1 | 126.5 (4) | La1—O8—H8A | 109.4 |
O2—C1—C2 | 121.3 (5) | La1—O8—H8B | 109.5 |
O1—C1—C2 | 111.8 (4) | H7A—O7—H7B | 109.5 |
N1—C2—C1 | 107.7 (4) | H8A—O8—H8B | 109.5 |
N1—C2—H2A | 110.2 | H9A—O9—H9B | 106.0 |
C1—C2—H2A | 110.2 | | |
Symmetry code: (i) x+1, y, z. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···Cl3ii | 0.89 | 2.59 | 3.231 (4) | 130 |
N1—H1A···Cl1iii | 0.89 | 2.66 | 3.320 (4) | 132 |
N1—H1B···Cl1iv | 0.89 | 2.59 | 3.173 (5) | 124 |
N1—H1C···O1ii | 0.89 | 2.06 | 2.864 (6) | 150 |
N1—H1C···O2 | 0.89 | 2.13 | 2.649 (5) | 117 |
N2—H2C···Cl2v | 0.89 | 2.76 | 3.360 (4) | 126 |
N2—H2D···Cl3vi | 0.89 | 2.46 | 3.228 (4) | 145 |
N2—H2E···Cl1vii | 0.89 | 2.45 | 3.254 (4) | 150 |
N3—H3A···Cl2iii | 0.89 | 2.54 | 3.203 (4) | 132 |
N3—H3B···Cl2viii | 0.89 | 2.29 | 3.122 (5) | 155 |
N3—H3C···Cl3iv | 0.89 | 2.36 | 3.214 (4) | 160 |
O7—H7A···Cl1ix | 0.85 | 2.40 | 3.158 (4) | 149 |
O7—H7B···Cl3vii | 0.85 | 2.68 | 3.179 (4) | 119 |
O8—H8A···O9viii | 0.96 | 1.94 | 2.752 (5) | 141 |
O8—H8B···O9 | 0.96 | 2.23 | 2.858 (5) | 122 |
O9—H9B···Cl2ix | 0.85 | 2.58 | 3.105 (4) | 121 |
Symmetry codes: (ii) x−1, y, z; (iii) x−1, y+1, z; (iv) −x, y+1/2, −z+3/2; (v) x−1/2, −y+1/2, −z+1; (vi) −x, y−1/2, −z+3/2; (vii) −x+1, y+1/2, −z+3/2; (viii) x−1/2, −y+3/2, −z+1; (ix) x, y+1, z. |
Experimental details
Crystal data |
Chemical formula | [La(C2H5NO2)3(H2O)2]Cl3·H2O |
Mr | 524.52 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 293 |
a, b, c (Å) | 4.798 (1), 12.094 (1), 30.974 (2) |
V (Å3) | 1797.3 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 2.86 |
Crystal size (mm) | 0.3 × 0.2 × 0.2 |
|
Data collection |
Diffractometer | Siemens P4 diffractometer |
Absorption correction | ψ scan (North et al., 1968) |
Tmin, Tmax | 0.509, 0.566 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3172, 3168, 3145 |
Rint | 0.074 |
(sin θ/λ)max (Å−1) | 0.595 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.032, 0.086, 0.97 |
No. of reflections | 3172 |
No. of parameters | 196 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.60, −0.74 |
Absolute structure | (Flack, 1983), 1274 Friedel pairs |
Absolute structure parameter | 0.0012 (2) |
Selected bond lengths (Å) topLa1—O3 | 2.507 (3) | La1—O6i | 2.565 (3) |
La1—O5 | 2.550 (3) | La1—O2i | 2.419 (4) |
La1—O7 | 2.570 (4) | La1—O4i | 2.486 (3) |
La1—O1 | 2.583 (3) | La1—O5i | 2.908 (4) |
La1—O8 | 2.594 (3) | | |
Symmetry code: (i) x+1, y, z. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···Cl3ii | 0.89 | 2.59 | 3.231 (4) | 130.0 |
N1—H1A···Cl1iii | 0.89 | 2.66 | 3.320 (4) | 131.8 |
N1—H1B···Cl1iv | 0.89 | 2.59 | 3.173 (5) | 124.3 |
N1—H1C···O1ii | 0.89 | 2.06 | 2.864 (6) | 150.4 |
N1—H1C···O2 | 0.89 | 2.13 | 2.649 (5) | 116.5 |
N2—H2C···Cl2v | 0.89 | 2.76 | 3.360 (4) | 126.3 |
N2—H2D···Cl3vi | 0.89 | 2.46 | 3.228 (4) | 145.3 |
N2—H2E···Cl1vii | 0.89 | 2.45 | 3.254 (4) | 149.9 |
N3—H3A···Cl2iii | 0.89 | 2.54 | 3.203 (4) | 131.6 |
N3—H3B···Cl2viii | 0.89 | 2.29 | 3.122 (5) | 155.2 |
N3—H3C···Cl3iv | 0.89 | 2.36 | 3.214 (4) | 159.7 |
O7—H7A···Cl1ix | 0.85 | 2.40 | 3.158 (4) | 149.1 |
O7—H7B···Cl3vii | 0.85 | 2.68 | 3.179 (4) | 119.0 |
O8—H8A···O9viii | 0.96 | 1.94 | 2.752 (5) | 140.7 |
O8—H8B···O9 | 0.96 | 2.23 | 2.858 (5) | 121.9 |
O9—H9B···Cl2ix | 0.85 | 2.58 | 3.105 (4) | 121.1 |
Symmetry codes: (ii) x−1, y, z; (iii) x−1, y+1, z; (iv) −x, y+1/2, −z+3/2; (v) x−1/2, −y+1/2, −z+1; (vi) −x, y−1/2, −z+3/2; (vii) −x+1, y+1/2, −z+3/2; (viii) x−1/2, −y+3/2, −z+1; (ix) x, y+1, z. |
Lanthanide ions are often used as spectroscopic probes of Ca2+ in studies of biological systems, as well as dyeing promoters in the wool dyeing industry, and diagnostic agents in clinical medicine (Brittain et al., 1978; Brittain, 1979; Fang et al., 1987; Lauffer et al., 1987). In order to obtain a deeper understanding of the interactions between lanthanide ions and biological tissue, studies of the bonding modes and structures of lanthanide complexes with some amino acids have been carried out. Studies on the coordination behaviour of rare-earth salts with some amino acids in water have been carried out using the semimicro method of phase-equilibrium study. Many studies on these complexes in the solid state have also appeared (Gao et al., 1993; Dang et al., 1995; Jiang et al., 1993; Chen et al., 1886). The present paper reports the crystal structure of the title compound, (I).
Compound (I) is a one-dimensional chain complex of infinite length along the a axis (Figs. 2 and 3). Its basic repeat unit, [La(gly)3(H2O)2]Cl3·H2O, consist of three glycine molecules in the zwitterion form, two coordinated water molecules, three free chloride ions and one water molecule of crystallization (Fig. 1). The three carboxyl groups from the three glycine molecules serve as bridging groups, which connect neighboring La atoms. The La···La distance is 4.798 (4) Å, showing that there is no direct metal–metal bond between the La atoms. The coordination number of La is nine and the coordination polyhedron can be approximated by a distorted trigonal prism (Fig. 2). The La—O bond lengths are in the range 2.419 (4)–2.908 (4) Å, and the average bond length is 2.576 (4) Å (Table 1).
There are two intramolecular hydrogen bonds and 14 intermolecular hydrogen bonds (Table 2). The three free Cl- anions are located in the neighborhood of the –NH3+ groups of the coordinated glycine molecules and form N—H···Cl hydrogen bonds with an average N···O distance of 3.123 (4) Å. The average hydrogen-bond length for water–water (O—H···O) is 2.805 (4) Å. The average hydrogen bond lengths for O—H···Cl and N—H···Cl are 3.147 (4) and 2.757 (4) Å, respectively. These hydrogen bonds produce a three-dimensional network in the crystal (Fig. 3).