Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807029431/wk2062sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807029431/wk2062Isup2.hkl |
CCDC reference: 293747
(µ-SCH2)2NCH2CH2CH3[Fe2(CO)6] (0.10 g, 0.23 mmol) was dissolved in dry acetonitrile (15 ml) and Me3NO.2H2O (51 mg, 0.46 mmol) was added under an argon atmosphere. When the color of the solution turned dark red Diphenylphosphine (46 mg, 0.25 mmol) was added and the solution was stirred at 293 K for 1.5 h and the color turned to red. After the solvent was removed in vacuum, the crude product was purified by column chromatography on silica gel with CH2Cl2/hexane (1:1) as eluent to give I as red solid (109 mg, 81%). Single crystals of (I) for X-ray analysis were grown by slow diffusion of hexane into a solution of the complex in CH2Cl2 at 275 K.
H atoms bonded to P atoms were located geometrically and allowed to ride on its parent atoms with distance restraints of P—H = 1.32 (2) Å, and with Uiso(H) = 1.2Ueq(P). Other H atoms were placed in calculated positions and refined using a riding model, with C—H = 0.93–0.97 Å and with Uiso(H) = 1.2 (1.5 for methyl groups) times Ueq(C).
Iron hydrogenases (Fe—H2ase) are highly efficient enzymes that catalyze the reversible reduction of protons to molecular hydrogen. Crystallographic study revealed that the active site of Fe—H2ase is comprised of one unusual low-valent diiron disulfide that is linked by a cysteine-ligand to a [Fe4S4] cluster, with one bridging carbonyl and an additional terminal carbonyl, cyanide and aqua ligands and the non-proteic dithiolate (Nicolet et al., 2000; Frey, 2002). The molecule of the title compound, (I), (Fig. 1), exhibits some resemblance to the active site of Fe-hydrogenases.
The central 2Fe2S structure in compound I is in the butterfly conformation, with a dihedral angle of 108.4 (2)° between the two Fe2S planes, and each iron atom displays pseudo-square-pyramidal geometry. The Fe—Fe distance in (I) (2.5143 (6) Å) agrees well with those found in other similar complexes [2.49–2.51 Å; Lawrence et al., 2001; Liu et al., 2004; Wang et al., 2005, Gao et al., 2007]. The phosphine group occupies an apical position. The propyl group on the bridged nitrogen atom is in an equatorial position and the propyl chain takes the zigzag form.
As shown in the packing diagram (Fig. 2), adjacent pairs of molecules are associated by S···S(3.625 Å) intermolecular non-bonded weak interactions. The distance is close to the sum of the van der Waals radii for two sulfur atoms (3.6 Å).
For literature on 2Fe2S complexes, where the two Fe atoms are bridged by a dithiolate ligand and each of the Fe atoms coordinated by carbonyl groups or tertiary phosphine ligands, see Lawrence et al. (2001); Liu et al. (2004); Wang et al. (2005); Gao et al. (2007).
For related literature, see: Frey (2002); Milway et al. (2006); Nicolet et al. (2000).
Data collection: SMART (Bruker, 2001); cell refinement: SMART; data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Bruker, 2001); software used to prepare material for publication: SHELXTL.
[Fe2(C5H11NS2)(C12H11P)(CO)5] | F(000) = 1200 |
Mr = 587.20 | Dx = 1.487 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 12.4627 (15) Å | Cell parameters from 3783 reflections |
b = 12.1985 (15) Å | θ = 2.4–23.4° |
c = 17.2573 (2) Å | µ = 1.36 mm−1 |
β = 90.162 (2)° | T = 273 K |
V = 2623.6 (6) Å3 | Block, red |
Z = 4 | 0.30 × 0.20 × 0.08 mm |
Bruker SMART 1K CCD area-detector diffractometer | 4885 independent reflections |
Radiation source: fine-focus sealed tube | 3350 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.041 |
φ and ω scans | θmax = 25.5°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −15→8 |
Tmin = 0.686, Tmax = 0.899 | k = −13→14 |
13194 measured reflections | l = −20→20 |
Refinement on F2 | 0 restraints |
Least-squares matrix: full | H atoms treated by a mixture of independent and constrained refinement |
R[F2 > 2σ(F2)] = 0.037 | w = 1/[σ2(Fo2) + (0.0429P)2] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.087 | (Δ/σ)max < 0.001 |
S = 0.92 | Δρmax = 0.44 e Å−3 |
4885 reflections | Δρmin = −0.38 e Å−3 |
302 parameters |
[Fe2(C5H11NS2)(C12H11P)(CO)5] | V = 2623.6 (6) Å3 |
Mr = 587.20 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 12.4627 (15) Å | µ = 1.36 mm−1 |
b = 12.1985 (15) Å | T = 273 K |
c = 17.2573 (2) Å | 0.30 × 0.20 × 0.08 mm |
β = 90.162 (2)° |
Bruker SMART 1K CCD area-detector diffractometer | 4885 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 3350 reflections with I > 2σ(I) |
Tmin = 0.686, Tmax = 0.899 | Rint = 0.041 |
13194 measured reflections |
R[F2 > 2σ(F2)] = 0.037 | 0 restraints |
wR(F2) = 0.087 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.92 | Δρmax = 0.44 e Å−3 |
4885 reflections | Δρmin = −0.38 e Å−3 |
302 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
Fe1 | 0.30424 (3) | 0.45814 (4) | 0.12088 (2) | 0.05683 (14) | |
Fe2 | 0.23171 (3) | 0.36249 (4) | 0.00279 (2) | 0.06549 (15) | |
P | 0.34731 (6) | 0.61660 (7) | 0.17360 (4) | 0.0584 (2) | |
S2 | 0.13569 (6) | 0.48156 (7) | 0.07511 (4) | 0.0643 (2) | |
S1 | 0.35457 (6) | 0.49763 (7) | −0.00134 (4) | 0.0620 (2) | |
O5 | 0.51096 (19) | 0.3537 (2) | 0.14933 (14) | 0.0892 (7) | |
C11 | 0.2452 (2) | 0.7071 (3) | 0.21361 (15) | 0.0594 (7) | |
C17 | 0.4470 (2) | 0.6044 (2) | 0.25035 (16) | 0.0623 (8) | |
C5 | 0.4302 (3) | 0.3951 (3) | 0.13735 (16) | 0.0657 (8) | |
O4 | 0.2164 (2) | 0.3518 (2) | 0.25765 (14) | 0.1033 (8) | |
C7 | 0.2972 (2) | 0.6299 (2) | −0.03031 (17) | 0.0698 (8) | |
H7A | 0.3553 | 0.6816 | −0.0381 | 0.084* | |
H7B | 0.2606 | 0.6207 | −0.0796 | 0.084* | |
C22 | 0.4207 (3) | 0.5575 (3) | 0.32002 (18) | 0.0893 (11) | |
H22A | 0.3502 | 0.5368 | 0.3294 | 0.107* | |
O1 | 0.1227 (2) | 0.3756 (2) | −0.14763 (15) | 0.1042 (9) | |
N1 | 0.22289 (19) | 0.6757 (2) | 0.02462 (13) | 0.0661 (7) | |
C4 | 0.2501 (2) | 0.3940 (3) | 0.20373 (19) | 0.0713 (9) | |
O3 | 0.4083 (2) | 0.2168 (2) | −0.04003 (16) | 0.1197 (10) | |
C12 | 0.1424 (2) | 0.6704 (3) | 0.22953 (17) | 0.0747 (9) | |
H12A | 0.1249 | 0.5973 | 0.2206 | 0.090* | |
C18 | 0.5521 (3) | 0.6346 (3) | 0.23811 (19) | 0.0735 (9) | |
H18A | 0.5716 | 0.6666 | 0.1913 | 0.088* | |
C1 | 0.1643 (3) | 0.3708 (3) | −0.0897 (2) | 0.0764 (9) | |
C19 | 0.6285 (3) | 0.6179 (3) | 0.2949 (2) | 0.0903 (11) | |
H19A | 0.6991 | 0.6391 | 0.2859 | 0.108* | |
C14 | 0.0908 (3) | 0.8476 (4) | 0.2707 (2) | 0.0965 (12) | |
H14A | 0.0388 | 0.8952 | 0.2897 | 0.116* | |
C9 | 0.1694 (4) | 0.8407 (4) | −0.0525 (2) | 0.1237 (15) | |
H9A | 0.0987 | 0.8103 | −0.0621 | 0.148* | |
H9B | 0.2157 | 0.8199 | −0.0951 | 0.148* | |
O2 | 0.1204 (2) | 0.1872 (2) | 0.08541 (18) | 0.1176 (10) | |
C3 | 0.3380 (3) | 0.2727 (3) | −0.02344 (18) | 0.0809 (10) | |
C20 | 0.6026 (4) | 0.5713 (3) | 0.3630 (3) | 0.1004 (12) | |
H20A | 0.6550 | 0.5599 | 0.4006 | 0.120* | |
C16 | 0.2692 (3) | 0.8157 (3) | 0.22726 (17) | 0.0743 (9) | |
H16A | 0.3380 | 0.8417 | 0.2174 | 0.089* | |
C2 | 0.1618 (3) | 0.2550 (3) | 0.0515 (2) | 0.0834 (10) | |
C13 | 0.0657 (3) | 0.7404 (4) | 0.25838 (19) | 0.0878 (11) | |
H13A | −0.0028 | 0.7147 | 0.2694 | 0.105* | |
C6 | 0.1233 (2) | 0.6155 (3) | 0.02812 (18) | 0.0723 (9) | |
H6A | 0.0964 | 0.6050 | −0.0242 | 0.087* | |
H6B | 0.0709 | 0.6589 | 0.0561 | 0.087* | |
C10 | 0.1619 (5) | 0.9682 (4) | −0.0479 (3) | 0.153 (2) | |
H10A | 0.1334 | 0.9962 | −0.0957 | 0.229* | |
H10B | 0.2322 | 0.9982 | −0.0392 | 0.229* | |
H10C | 0.1156 | 0.9887 | −0.0060 | 0.229* | |
C21 | 0.4982 (4) | 0.5408 (4) | 0.3766 (2) | 0.1135 (14) | |
H21A | 0.4796 | 0.5089 | 0.4237 | 0.136* | |
H1 | 0.3993 (18) | 0.6872 (19) | 0.1294 (13) | 0.061 (7)* | |
C15 | 0.1918 (3) | 0.8861 (3) | 0.2554 (2) | 0.0918 (11) | |
H15A | 0.2083 | 0.9595 | 0.2640 | 0.110* | |
C8 | 0.2117 (3) | 0.7970 (3) | 0.0188 (2) | 0.0990 (12) | |
H8A | 0.1657 | 0.8212 | 0.0607 | 0.119* | |
H8B | 0.2818 | 0.8292 | 0.0275 | 0.119* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Fe1 | 0.0436 (2) | 0.0801 (3) | 0.0468 (2) | −0.00482 (19) | 0.00266 (17) | −0.0036 (2) |
Fe2 | 0.0520 (3) | 0.0888 (4) | 0.0557 (3) | −0.0045 (2) | 0.0037 (2) | −0.0147 (2) |
P | 0.0474 (4) | 0.0806 (6) | 0.0472 (4) | −0.0090 (4) | 0.0007 (3) | −0.0009 (4) |
S2 | 0.0407 (4) | 0.0926 (6) | 0.0597 (4) | −0.0059 (4) | 0.0050 (3) | −0.0133 (4) |
S1 | 0.0424 (4) | 0.0942 (6) | 0.0496 (4) | 0.0001 (4) | 0.0043 (3) | −0.0024 (4) |
O5 | 0.0612 (15) | 0.118 (2) | 0.0883 (16) | 0.0159 (13) | 0.0021 (13) | 0.0201 (13) |
C11 | 0.0552 (19) | 0.079 (2) | 0.0445 (15) | −0.0028 (15) | −0.0037 (13) | −0.0057 (14) |
C17 | 0.0560 (18) | 0.075 (2) | 0.0556 (17) | −0.0081 (15) | −0.0063 (14) | −0.0049 (15) |
C5 | 0.060 (2) | 0.085 (2) | 0.0525 (16) | −0.0046 (17) | 0.0073 (15) | 0.0067 (16) |
O4 | 0.108 (2) | 0.122 (2) | 0.0805 (16) | −0.0190 (15) | 0.0295 (15) | 0.0187 (14) |
C7 | 0.0607 (19) | 0.092 (2) | 0.0566 (17) | 0.0015 (16) | 0.0021 (15) | 0.0050 (16) |
C22 | 0.076 (2) | 0.132 (3) | 0.060 (2) | −0.023 (2) | −0.0126 (18) | 0.005 (2) |
O1 | 0.101 (2) | 0.140 (2) | 0.0720 (16) | −0.0120 (15) | −0.0218 (15) | −0.0162 (15) |
N1 | 0.0534 (15) | 0.0848 (19) | 0.0602 (15) | 0.0054 (13) | 0.0046 (12) | −0.0012 (13) |
C4 | 0.061 (2) | 0.087 (2) | 0.066 (2) | −0.0055 (17) | 0.0042 (17) | −0.0049 (18) |
O3 | 0.114 (2) | 0.118 (2) | 0.128 (2) | 0.0364 (18) | 0.0429 (19) | 0.0009 (18) |
C12 | 0.064 (2) | 0.098 (3) | 0.0629 (19) | −0.0093 (18) | 0.0071 (16) | −0.0216 (17) |
C18 | 0.057 (2) | 0.089 (2) | 0.074 (2) | −0.0034 (16) | −0.0104 (17) | −0.0060 (17) |
C1 | 0.060 (2) | 0.097 (3) | 0.073 (2) | −0.0115 (17) | 0.0076 (18) | −0.0206 (19) |
C19 | 0.064 (2) | 0.096 (3) | 0.111 (3) | 0.0000 (19) | −0.021 (2) | −0.017 (2) |
C14 | 0.083 (3) | 0.132 (4) | 0.075 (2) | 0.026 (3) | −0.002 (2) | −0.027 (2) |
C9 | 0.137 (4) | 0.148 (5) | 0.087 (3) | 0.016 (3) | −0.010 (3) | −0.003 (3) |
O2 | 0.118 (2) | 0.103 (2) | 0.131 (2) | −0.0263 (18) | 0.0403 (19) | −0.0058 (18) |
C3 | 0.081 (3) | 0.093 (3) | 0.069 (2) | −0.001 (2) | 0.0114 (19) | −0.0051 (18) |
C20 | 0.098 (3) | 0.105 (3) | 0.098 (3) | 0.005 (3) | −0.046 (3) | −0.008 (2) |
C16 | 0.070 (2) | 0.086 (3) | 0.067 (2) | −0.0087 (19) | −0.0003 (17) | −0.0069 (18) |
C2 | 0.069 (2) | 0.099 (3) | 0.082 (2) | −0.002 (2) | 0.0084 (19) | −0.025 (2) |
C13 | 0.059 (2) | 0.126 (3) | 0.078 (2) | −0.001 (2) | 0.0031 (17) | −0.034 (2) |
C6 | 0.0519 (19) | 0.095 (2) | 0.070 (2) | 0.0088 (17) | −0.0029 (15) | −0.0055 (17) |
C10 | 0.226 (6) | 0.091 (4) | 0.141 (4) | 0.044 (3) | 0.021 (4) | 0.007 (3) |
C21 | 0.138 (4) | 0.133 (4) | 0.070 (2) | −0.024 (3) | −0.032 (3) | 0.018 (2) |
C15 | 0.105 (3) | 0.084 (3) | 0.086 (3) | 0.004 (2) | 0.005 (2) | −0.013 (2) |
C8 | 0.102 (3) | 0.111 (3) | 0.084 (3) | 0.024 (2) | 0.003 (2) | 0.004 (2) |
Fe1—C4 | 1.766 (3) | O3—C3 | 1.148 (4) |
Fe1—C5 | 1.770 (3) | C12—C13 | 1.376 (4) |
Fe1—P | 2.2021 (9) | C12—H12A | 0.9300 |
Fe1—S1 | 2.2543 (8) | C18—C19 | 1.380 (4) |
Fe1—S2 | 2.2603 (9) | C18—H18A | 0.9300 |
Fe1—Fe2 | 2.5143 (6) | C19—C20 | 1.345 (5) |
Fe2—C3 | 1.778 (4) | C19—H19A | 0.9300 |
Fe2—C2 | 1.786 (4) | C14—C13 | 1.361 (5) |
Fe2—C1 | 1.805 (4) | C14—C15 | 1.370 (5) |
Fe2—S1 | 2.2512 (9) | C14—H14A | 0.9300 |
Fe2—S2 | 2.2602 (9) | C9—C8 | 1.439 (5) |
P—C17 | 1.820 (3) | C9—C10 | 1.561 (5) |
P—C11 | 1.821 (3) | C9—H9A | 0.9700 |
P—H1 | 1.32 (2) | C9—H9B | 0.9700 |
S2—C6 | 1.831 (3) | O2—C2 | 1.138 (4) |
S1—C7 | 1.833 (3) | C20—C21 | 1.374 (5) |
O5—C5 | 1.145 (3) | C20—H20A | 0.9300 |
C11—C16 | 1.378 (4) | C16—C15 | 1.381 (4) |
C11—C12 | 1.386 (4) | C16—H16A | 0.9300 |
C17—C22 | 1.372 (4) | C13—H13A | 0.9300 |
C17—C18 | 1.377 (4) | C6—H6A | 0.9700 |
O4—C4 | 1.144 (3) | C6—H6B | 0.9700 |
C7—N1 | 1.440 (3) | C10—H10A | 0.9600 |
C7—H7A | 0.9700 | C10—H10B | 0.9600 |
C7—H7B | 0.9700 | C10—H10C | 0.9600 |
C22—C21 | 1.387 (5) | C21—H21A | 0.9300 |
C22—H22A | 0.9300 | C15—H15A | 0.9300 |
O1—C1 | 1.126 (4) | C8—H8A | 0.9700 |
N1—C6 | 1.444 (4) | C8—H8B | 0.9700 |
N1—C8 | 1.490 (4) | ||
C4—Fe1—C5 | 91.03 (13) | C7—N1—C6 | 112.7 (2) |
C4—Fe1—P | 98.50 (11) | C7—N1—C8 | 113.7 (2) |
C5—Fe1—P | 95.76 (11) | C6—N1—C8 | 115.3 (3) |
C4—Fe1—S1 | 163.81 (11) | O4—C4—Fe1 | 179.0 (3) |
C5—Fe1—S1 | 89.67 (9) | C13—C12—C11 | 121.0 (3) |
P—Fe1—S1 | 97.52 (3) | C13—C12—H12A | 119.5 |
C4—Fe1—S2 | 88.97 (10) | C11—C12—H12A | 119.5 |
C5—Fe1—S2 | 159.03 (11) | C17—C18—C19 | 120.4 (3) |
P—Fe1—S2 | 104.99 (3) | C17—C18—H18A | 119.8 |
S1—Fe1—S2 | 84.65 (3) | C19—C18—H18A | 119.8 |
C4—Fe1—Fe2 | 108.26 (10) | O1—C1—Fe2 | 179.5 (3) |
C5—Fe1—Fe2 | 104.18 (10) | C20—C19—C18 | 121.1 (4) |
P—Fe1—Fe2 | 145.99 (3) | C20—C19—H19A | 119.5 |
S1—Fe1—Fe2 | 56.02 (2) | C18—C19—H19A | 119.5 |
S2—Fe1—Fe2 | 56.20 (2) | C13—C14—C15 | 120.7 (3) |
C3—Fe2—C2 | 91.87 (16) | C13—C14—H14A | 119.7 |
C3—Fe2—C1 | 98.92 (15) | C15—C14—H14A | 119.7 |
C2—Fe2—C1 | 103.33 (15) | C8—C9—C10 | 110.4 (4) |
C3—Fe2—S1 | 86.31 (12) | C8—C9—H9A | 109.6 |
C2—Fe2—S1 | 152.32 (11) | C10—C9—H9A | 109.6 |
C1—Fe2—S1 | 104.24 (11) | C8—C9—H9B | 109.6 |
C3—Fe2—S2 | 158.79 (11) | C10—C9—H9B | 109.6 |
C2—Fe2—S2 | 87.26 (11) | H9A—C9—H9B | 108.1 |
C1—Fe2—S2 | 101.90 (11) | O3—C3—Fe2 | 178.4 (4) |
S1—Fe2—S2 | 84.73 (3) | C19—C20—C21 | 119.5 (4) |
C3—Fe2—Fe1 | 103.04 (11) | C19—C20—H20A | 120.2 |
C2—Fe2—Fe1 | 97.72 (11) | C21—C20—H20A | 120.2 |
C1—Fe2—Fe1 | 148.90 (11) | C11—C16—C15 | 120.5 (3) |
S1—Fe2—Fe1 | 56.14 (2) | C11—C16—H16A | 119.8 |
S2—Fe2—Fe1 | 56.21 (2) | C15—C16—H16A | 119.8 |
C17—P—C11 | 104.48 (13) | O2—C2—Fe2 | 176.7 (4) |
C17—P—Fe1 | 113.19 (10) | C14—C13—C12 | 119.6 (3) |
C11—P—Fe1 | 121.25 (10) | C14—C13—H13A | 120.2 |
C17—P—H1 | 98.0 (10) | C12—C13—H13A | 120.2 |
C11—P—H1 | 99.6 (10) | N1—C6—S2 | 113.6 (2) |
Fe1—P—H1 | 117.0 (10) | N1—C6—H6A | 108.8 |
C6—S2—Fe2 | 111.91 (10) | S2—C6—H6A | 108.8 |
C6—S2—Fe1 | 110.18 (10) | N1—C6—H6B | 108.8 |
Fe2—S2—Fe1 | 67.59 (3) | S2—C6—H6B | 108.8 |
C7—S1—Fe2 | 112.84 (10) | H6A—C6—H6B | 107.7 |
C7—S1—Fe1 | 109.50 (10) | C9—C10—H10A | 109.5 |
Fe2—S1—Fe1 | 67.84 (3) | C9—C10—H10B | 109.5 |
C16—C11—C12 | 118.5 (3) | H10A—C10—H10B | 109.5 |
C16—C11—P | 119.7 (2) | C9—C10—H10C | 109.5 |
C12—C11—P | 121.8 (2) | H10A—C10—H10C | 109.5 |
C22—C17—C18 | 118.4 (3) | H10B—C10—H10C | 109.5 |
C22—C17—P | 120.5 (2) | C20—C21—C22 | 119.8 (4) |
C18—C17—P | 120.9 (2) | C20—C21—H21A | 120.1 |
O5—C5—Fe1 | 178.7 (3) | C22—C21—H21A | 120.1 |
N1—C7—S1 | 114.4 (2) | C14—C15—C16 | 119.8 (4) |
N1—C7—H7A | 108.7 | C14—C15—H15A | 120.1 |
S1—C7—H7A | 108.7 | C16—C15—H15A | 120.1 |
N1—C7—H7B | 108.7 | C9—C8—N1 | 117.4 (3) |
S1—C7—H7B | 108.7 | C9—C8—H8A | 108.0 |
H7A—C7—H7B | 107.6 | N1—C8—H8A | 108.0 |
C17—C22—C21 | 120.8 (3) | C9—C8—H8B | 108.0 |
C17—C22—H22A | 119.6 | N1—C8—H8B | 108.0 |
C21—C22—H22A | 119.6 | H8A—C8—H8B | 107.2 |
C4—Fe1—Fe2—C3 | −99.28 (16) | C4—Fe1—S1—Fe2 | 14.9 (4) |
C5—Fe1—Fe2—C3 | −3.37 (15) | C5—Fe1—S1—Fe2 | 107.42 (10) |
P—Fe1—Fe2—C3 | 120.64 (12) | P—Fe1—S1—Fe2 | −156.82 (3) |
S1—Fe1—Fe2—C3 | 76.41 (12) | S2—Fe1—S1—Fe2 | −52.37 (3) |
S2—Fe1—Fe2—C3 | −175.18 (12) | C17—P—C11—C16 | 67.9 (3) |
C4—Fe1—Fe2—C2 | −5.54 (16) | Fe1—P—C11—C16 | −162.90 (19) |
C5—Fe1—Fe2—C2 | 90.36 (15) | C17—P—C11—C12 | −113.5 (3) |
P—Fe1—Fe2—C2 | −145.63 (12) | Fe1—P—C11—C12 | 15.8 (3) |
S1—Fe1—Fe2—C2 | 170.14 (12) | C11—P—C17—C22 | 63.2 (3) |
S2—Fe1—Fe2—C2 | −81.44 (12) | Fe1—P—C17—C22 | −70.7 (3) |
C4—Fe1—Fe2—C1 | 126.9 (2) | C11—P—C17—C18 | −121.4 (3) |
C5—Fe1—Fe2—C1 | −137.2 (2) | Fe1—P—C17—C18 | 104.7 (2) |
P—Fe1—Fe2—C1 | −13.2 (2) | C4—Fe1—C5—O5 | −11 (15) |
S1—Fe1—Fe2—C1 | −57.39 (19) | P—Fe1—C5—O5 | 87 (15) |
S2—Fe1—Fe2—C1 | 51.03 (19) | S1—Fe1—C5—O5 | −175 (100) |
C4—Fe1—Fe2—S1 | −175.68 (11) | S2—Fe1—C5—O5 | −101 (15) |
C5—Fe1—Fe2—S1 | −79.78 (10) | Fe2—Fe1—C5—O5 | −120 (15) |
P—Fe1—Fe2—S1 | 44.23 (5) | Fe2—S1—C7—N1 | 66.4 (2) |
S2—Fe1—Fe2—S1 | 108.41 (4) | Fe1—S1—C7—N1 | −7.0 (2) |
C4—Fe1—Fe2—S2 | 75.90 (11) | C18—C17—C22—C21 | −0.2 (5) |
C5—Fe1—Fe2—S2 | 171.81 (10) | P—C17—C22—C21 | 175.3 (3) |
P—Fe1—Fe2—S2 | −64.18 (5) | S1—C7—N1—C6 | −70.3 (3) |
S1—Fe1—Fe2—S2 | −108.41 (4) | S1—C7—N1—C8 | 156.2 (2) |
C4—Fe1—P—C17 | 62.32 (15) | C5—Fe1—C4—O4 | 4 (20) |
C5—Fe1—P—C17 | −29.59 (14) | P—Fe1—C4—O4 | −92 (20) |
S1—Fe1—P—C17 | −120.01 (11) | S1—Fe1—C4—O4 | 97 (20) |
S2—Fe1—P—C17 | 153.54 (11) | S2—Fe1—C4—O4 | 163 (20) |
Fe2—Fe1—P—C17 | −155.71 (11) | Fe2—Fe1—C4—O4 | 110 (20) |
C4—Fe1—P—C11 | −62.99 (15) | C16—C11—C12—C13 | −0.1 (5) |
C5—Fe1—P—C11 | −154.90 (14) | P—C11—C12—C13 | −178.8 (2) |
S1—Fe1—P—C11 | 114.67 (11) | C22—C17—C18—C19 | 0.0 (5) |
S2—Fe1—P—C11 | 28.22 (11) | P—C17—C18—C19 | −175.5 (2) |
Fe2—Fe1—P—C11 | 78.98 (12) | C3—Fe2—C1—O1 | −5 (51) |
C3—Fe2—S2—C6 | 116.7 (3) | C2—Fe2—C1—O1 | −99 (51) |
C2—Fe2—S2—C6 | −155.14 (16) | S1—Fe2—C1—O1 | 84 (51) |
C1—Fe2—S2—C6 | −52.10 (15) | S2—Fe2—C1—O1 | 171 (100) |
S1—Fe2—S2—C6 | 51.37 (11) | Fe1—Fe2—C1—O1 | 130 (51) |
Fe1—Fe2—S2—C6 | 103.67 (11) | C17—C18—C19—C20 | 0.4 (5) |
C3—Fe2—S2—Fe1 | 13.1 (3) | C2—Fe2—C3—O3 | −141 (12) |
C2—Fe2—S2—Fe1 | 101.18 (12) | C1—Fe2—C3—O3 | 115 (12) |
C1—Fe2—S2—Fe1 | −155.77 (11) | S1—Fe2—C3—O3 | 11 (12) |
S1—Fe2—S2—Fe1 | −52.30 (3) | S2—Fe2—C3—O3 | −54 (12) |
C4—Fe1—S2—C6 | 140.93 (15) | Fe1—Fe2—C3—O3 | −43 (12) |
C5—Fe1—S2—C6 | −128.9 (3) | C18—C19—C20—C21 | −0.5 (6) |
P—Fe1—S2—C6 | 42.41 (11) | C12—C11—C16—C15 | −0.6 (4) |
S1—Fe1—S2—C6 | −53.97 (11) | P—C11—C16—C15 | 178.1 (2) |
Fe2—Fe1—S2—C6 | −106.17 (11) | C3—Fe2—C2—O2 | 80 (6) |
C4—Fe1—S2—Fe2 | −112.90 (11) | C1—Fe2—C2—O2 | 179 (100) |
C5—Fe1—S2—Fe2 | −22.7 (3) | S1—Fe2—C2—O2 | −6 (6) |
P—Fe1—S2—Fe2 | 148.58 (3) | S2—Fe2—C2—O2 | −79 (6) |
S1—Fe1—S2—Fe2 | 52.21 (3) | Fe1—Fe2—C2—O2 | −24 (6) |
C3—Fe2—S1—C7 | 148.92 (15) | C15—C14—C13—C12 | −0.7 (6) |
C2—Fe2—S1—C7 | −124.1 (3) | C11—C12—C13—C14 | 0.7 (5) |
C1—Fe2—S1—C7 | 50.64 (15) | C7—N1—C6—S2 | 71.9 (3) |
S2—Fe2—S1—C7 | −50.33 (10) | C8—N1—C6—S2 | −155.4 (2) |
Fe1—Fe2—S1—C7 | −102.69 (11) | Fe2—S2—C6—N1 | −69.1 (2) |
C3—Fe2—S1—Fe1 | −108.40 (11) | Fe1—S2—C6—N1 | 4.0 (2) |
C2—Fe2—S1—Fe1 | −21.4 (2) | C19—C20—C21—C22 | 0.3 (7) |
C1—Fe2—S1—Fe1 | 153.33 (11) | C17—C22—C21—C20 | 0.1 (6) |
S2—Fe2—S1—Fe1 | 52.36 (3) | C13—C14—C15—C16 | 0.0 (6) |
C4—Fe1—S1—C7 | 122.3 (4) | C11—C16—C15—C14 | 0.7 (5) |
C5—Fe1—S1—C7 | −145.10 (15) | C10—C9—C8—N1 | 179.3 (3) |
P—Fe1—S1—C7 | −49.34 (11) | C7—N1—C8—C9 | 63.0 (4) |
S2—Fe1—S1—C7 | 55.12 (11) | C6—N1—C8—C9 | −69.2 (4) |
Fe2—Fe1—S1—C7 | 107.48 (11) |
Experimental details
Crystal data | |
Chemical formula | [Fe2(C5H11NS2)(C12H11P)(CO)5] |
Mr | 587.20 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 273 |
a, b, c (Å) | 12.4627 (15), 12.1985 (15), 17.2573 (2) |
β (°) | 90.162 (2) |
V (Å3) | 2623.6 (6) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.36 |
Crystal size (mm) | 0.30 × 0.20 × 0.08 |
Data collection | |
Diffractometer | Bruker SMART 1K CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.686, 0.899 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13194, 4885, 3350 |
Rint | 0.041 |
(sin θ/λ)max (Å−1) | 0.606 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.037, 0.087, 0.92 |
No. of reflections | 4885 |
No. of parameters | 302 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.44, −0.38 |
Computer programs: SMART (Bruker, 2001), SMART, SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Bruker, 2001), SHELXTL.
Fe1—P | 2.2021 (9) | P—H1 | 1.32 (2) |
Fe1—Fe2 | 2.5143 (6) | ||
P—Fe1—Fe2 | 145.99 (3) | C7—N1—C8 | 113.7 (2) |
C7—N1—C6 | 112.7 (2) | C6—N1—C8 | 115.3 (3) |
Iron hydrogenases (Fe—H2ase) are highly efficient enzymes that catalyze the reversible reduction of protons to molecular hydrogen. Crystallographic study revealed that the active site of Fe—H2ase is comprised of one unusual low-valent diiron disulfide that is linked by a cysteine-ligand to a [Fe4S4] cluster, with one bridging carbonyl and an additional terminal carbonyl, cyanide and aqua ligands and the non-proteic dithiolate (Nicolet et al., 2000; Frey, 2002). The molecule of the title compound, (I), (Fig. 1), exhibits some resemblance to the active site of Fe-hydrogenases.
The central 2Fe2S structure in compound I is in the butterfly conformation, with a dihedral angle of 108.4 (2)° between the two Fe2S planes, and each iron atom displays pseudo-square-pyramidal geometry. The Fe—Fe distance in (I) (2.5143 (6) Å) agrees well with those found in other similar complexes [2.49–2.51 Å; Lawrence et al., 2001; Liu et al., 2004; Wang et al., 2005, Gao et al., 2007]. The phosphine group occupies an apical position. The propyl group on the bridged nitrogen atom is in an equatorial position and the propyl chain takes the zigzag form.
As shown in the packing diagram (Fig. 2), adjacent pairs of molecules are associated by S···S(3.625 Å) intermolecular non-bonded weak interactions. The distance is close to the sum of the van der Waals radii for two sulfur atoms (3.6 Å).