supplementary materials
trans-Dichloridobis(2,2-dimethylpropane-1,3-diamine-
2N,N')chromium(III) perchlorate
In the title salt, [CrCl2(C5H14N2)2]ClO4, the Cr atom is in a trans-CrCl2N4 octahedral environment comprising the four N atoms of two chelating 2,2-dimethylpropane-1,3-diamine ligands and two Cl atoms. The two six-membered CrC3N2 rings in the cation adopt anti chair-chair conformations with respect to each other. The perchlorate anion is disordered over two positions in respect of the Cl and an O atom in a 6:4 ratio. N-H
O hydrogen bonds link the cations and anions into a layer structure.
The complex trans-[Cr(Me2tn)2Cl2]ClO4 was prepared according to
the literature (House, 1986). The crystalline product deposited with
ice-bath cooling was filtered off, and washed with cold 2-propanol and
then diethyl ether. Recrystallization of the crude precipitate from 0.5M HCl
and 70% HClO4 solution afforded dark green crystals suitable for X-ray
analysis. Anal. Found: C, 28.02; H, 6.50; N, 13.08%. Calc. for
C10H28Cl3CrN4O4: C, 28.15; H, 6.61; N, 13.13%.
H atoms were positioned geometrically and refined as riding atoms,
with C—H = 0.97 (methylene), 0.96 (methyl) Å, and N—H = 0.90 Å
respectively, Uiso(H) = 1.2Ueq(C & N).
The Cl and one O atoms in the perchlorate anion are disordered over two
positions with site-occupancy factors fixed at 0.60 (for atoms labelled A)
and 0.40 (for atoms labelled B) in the final refinement.
Data collection: STADI-4 (Stoe & Cie, 1996); cell refinement: STADI-4 (Stoe & Cie, 1996); data reduction: X-RED (Stoe & Cie, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).
trans-Dichloridobis(2,2-dimethylpropane-1,3-diamine-
κ2N,
N')chromium(III) perchlorate
top
Crystal data top
| [CrCl2(C5H14N2)2]ClO4 | F(000) = 892 |
| Mr = 426.71 | Dx = 1.506 Mg m−3 |
| Monoclinic, P21/c | Mo Kα radiation, λ = 0.71069 Å |
| Hall symbol: -P_2ybc | Cell parameters from 54 reflections |
| a = 6.6373 (6) Å | θ = 9.5–10.4° |
| b = 20.767 (2) Å | µ = 1.05 mm−1 |
| c = 13.878 (2) Å | T = 298 K |
| β = 100.249 (9)° | Block, green |
| V = 1882.4 (4) Å3 | 0.32 × 0.30 × 0.25 mm |
| Z = 4 | |
Data collection top
Stoe Stadi-4 diffractometer | 3453 reflections with I > 2σ(I) |
| Radiation source: fine-focus sealed tube | Rint = 0.0000 |
| graphite | θmax = 27.5°, θmin = 1.8° |
| ω/2–θ scans | h = −8→8 |
Absorption correction: numerical (X-SHAPE; Stoe & Cie, 1996) | k = 0→26 |
| Tmin = 0.805, Tmax = 0.942 | l = 0→18 |
| 4305 measured reflections | 3 standard reflections every 60 min |
| 4305 independent reflections | intensity decay: 2.7% |
Refinement top
| Refinement on F2 | Primary atom site location: structure-invariant direct methods |
| Least-squares matrix: full | Secondary atom site location: difference Fourier map |
| R[F2 > 2σ(F2)] = 0.051 | Hydrogen site location: inferred from neighbouring sites |
| wR(F2) = 0.146 | H-atom parameters constrained |
| S = 1.11 | w = 1/[σ2(Fo2) + (0.0733P)2 + 1.4729P] where P = (Fo2 + 2Fc2)/3 |
| 4305 reflections | (Δ/σ)max < 0.001 |
| 217 parameters | Δρmax = 0.54 e Å−3 |
| 0 restraints | Δρmin = −0.81 e Å−3 |
Crystal data top
| [CrCl2(C5H14N2)2]ClO4 | V = 1882.4 (4) Å3 |
| Mr = 426.71 | Z = 4 |
| Monoclinic, P21/c | Mo Kα radiation |
| a = 6.6373 (6) Å | µ = 1.05 mm−1 |
| b = 20.767 (2) Å | T = 298 K |
| c = 13.878 (2) Å | 0.32 × 0.30 × 0.25 mm |
| β = 100.249 (9)° | |
Data collection top
Stoe Stadi-4 diffractometer | 3453 reflections with I > 2σ(I) |
Absorption correction: numerical (X-SHAPE; Stoe & Cie, 1996) | Rint = 0.0000 |
| Tmin = 0.805, Tmax = 0.942 | θmax = 27.5° |
| 4305 measured reflections | 3 standard reflections every 60 min |
| 4305 independent reflections | intensity decay: 2.7% |
Refinement top
| R[F2 > 2σ(F2)] = 0.051 | H-atom parameters constrained |
| wR(F2) = 0.146 | Δρmax = 0.54 e Å−3 |
| S = 1.11 | Δρmin = −0.81 e Å−3 |
| 4305 reflections | Absolute structure: ? |
| 217 parameters | Flack parameter: ? |
| 0 restraints | Rogers parameter: ? |
Special details top
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes)
are estimated using the full covariance matrix. The cell esds are taken
into account individually in the estimation of esds in distances, angles
and torsion angles; correlations between esds in cell parameters are only
used when they are defined by crystal symmetry. An approximate (isotropic)
treatment of cell esds is used for estimating esds 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 > 2sigma(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 | Occ. (<1) |
| Cr | 0.43254 (6) | 0.23278 (2) | 0.57694 (3) | 0.03056 (15) | |
| Cl1 | 0.67222 (13) | 0.25634 (5) | 0.47898 (7) | 0.0540 (2) | |
| Cl2 | 0.18895 (12) | 0.21076 (4) | 0.67312 (7) | 0.0493 (2) | |
| Cl3A | 0.9541 (3) | 0.11988 (10) | 0.31249 (14) | 0.0471 (4) | 0.60 |
| Cl3B | 0.8697 (4) | 0.11095 (15) | 0.3227 (2) | 0.0434 (6) | 0.40 |
| O4B | 0.6845 (14) | 0.1083 (5) | 0.3541 (7) | 0.096 (3) | 0.40 |
| O4A | 1.1593 (9) | 0.1344 (3) | 0.3048 (5) | 0.0913 (18) | 0.60 |
| O1 | 0.8766 (6) | 0.06609 (19) | 0.2505 (3) | 0.0957 (12) | |
| O2 | 0.8510 (7) | 0.1748 (2) | 0.2793 (3) | 0.1124 (15) | |
| O3 | 0.9840 (9) | 0.1052 (3) | 0.4093 (3) | 0.140 (2) | |
| N1 | 0.6658 (4) | 0.20091 (13) | 0.6894 (2) | 0.0420 (6) | |
| H1AN | 0.7834 | 0.2010 | 0.6656 | 0.050* | |
| H1BN | 0.6795 | 0.2305 | 0.7375 | 0.050* | |
| N2 | 0.4181 (4) | 0.13895 (13) | 0.5210 (2) | 0.0466 (7) | |
| H2AN | 0.2998 | 0.1354 | 0.4782 | 0.056* | |
| H2BN | 0.5200 | 0.1348 | 0.4865 | 0.056* | |
| N3 | 0.1983 (4) | 0.26418 (12) | 0.46576 (19) | 0.0385 (6) | |
| H3AN | 0.1880 | 0.2354 | 0.4167 | 0.046* | |
| H3BN | 0.0806 | 0.2622 | 0.4893 | 0.046* | |
| N4 | 0.4506 (4) | 0.32609 (13) | 0.6350 (2) | 0.0448 (6) | |
| H4AN | 0.3526 | 0.3297 | 0.6719 | 0.054* | |
| H4BN | 0.5717 | 0.3295 | 0.6758 | 0.054* | |
| C1 | 0.6476 (5) | 0.13679 (16) | 0.7353 (2) | 0.0444 (7) | |
| H1A | 0.5282 | 0.1372 | 0.7667 | 0.053* | |
| H1B | 0.7668 | 0.1302 | 0.7860 | 0.053* | |
| C2 | 0.6295 (5) | 0.07995 (15) | 0.6641 (3) | 0.0411 (7) | |
| C3 | 0.6162 (7) | 0.01867 (19) | 0.7255 (3) | 0.0644 (11) | |
| H3A | 0.6049 | −0.0184 | 0.6836 | 0.077* | |
| H3B | 0.4982 | 0.0212 | 0.7565 | 0.077* | |
| H3C | 0.7374 | 0.0151 | 0.7746 | 0.077* | |
| C4 | 0.8169 (6) | 0.07509 (19) | 0.6154 (3) | 0.0569 (9) | |
| H4A | 0.8011 | 0.0393 | 0.5708 | 0.068* | |
| H4B | 0.9368 | 0.0688 | 0.6645 | 0.068* | |
| H4C | 0.8311 | 0.1141 | 0.5801 | 0.068* | |
| C5 | 0.4308 (5) | 0.08283 (16) | 0.5890 (3) | 0.0495 (8) | |
| H5A | 0.4181 | 0.0435 | 0.5507 | 0.059* | |
| H5B | 0.3161 | 0.0846 | 0.6235 | 0.059* | |
| C6 | 0.2096 (5) | 0.32895 (16) | 0.4223 (2) | 0.0441 (7) | |
| H6A | 0.0874 | 0.3356 | 0.3735 | 0.053* | |
| H6B | 0.3261 | 0.3300 | 0.3889 | 0.053* | |
| C7 | 0.2293 (5) | 0.38464 (15) | 0.4953 (2) | 0.0410 (7) | |
| C8 | 0.2337 (8) | 0.4469 (2) | 0.4358 (4) | 0.0715 (12) | |
| H8A | 0.2455 | 0.4833 | 0.4791 | 0.086* | |
| H8B | 0.1095 | 0.4503 | 0.3886 | 0.086* | |
| H8C | 0.3488 | 0.4459 | 0.4026 | 0.086* | |
| C9 | 0.4311 (5) | 0.38267 (15) | 0.5681 (3) | 0.0469 (8) | |
| H9A | 0.5435 | 0.3821 | 0.5320 | 0.056* | |
| H9B | 0.4433 | 0.4217 | 0.6071 | 0.056* | |
| C10 | 0.0472 (6) | 0.38715 (19) | 0.5480 (3) | 0.0571 (9) | |
| H10A | 0.0640 | 0.4224 | 0.5935 | 0.069* | |
| H10B | 0.0388 | 0.3475 | 0.5827 | 0.069* | |
| H10C | −0.0762 | 0.3932 | 0.5010 | 0.069* | |
Atomic displacement parameters (Å2) top| | U11 | U22 | U33 | U12 | U13 | U23 |
| Cr | 0.0243 (2) | 0.0293 (2) | 0.0375 (3) | 0.00052 (16) | 0.00378 (17) | −0.00218 (18) |
| Cl1 | 0.0375 (4) | 0.0574 (5) | 0.0726 (6) | 0.0075 (4) | 0.0244 (4) | 0.0073 (4) |
| Cl2 | 0.0377 (4) | 0.0561 (5) | 0.0578 (5) | 0.0062 (3) | 0.0185 (4) | 0.0123 (4) |
| Cl3A | 0.0561 (12) | 0.0449 (9) | 0.0375 (8) | 0.0080 (9) | 0.0011 (9) | −0.0001 (6) |
| Cl3B | 0.0381 (13) | 0.0507 (14) | 0.0405 (12) | 0.0016 (11) | 0.0046 (11) | 0.0027 (9) |
| O4B | 0.077 (5) | 0.122 (8) | 0.096 (6) | −0.025 (5) | 0.034 (5) | −0.052 (6) |
| O4A | 0.065 (3) | 0.100 (4) | 0.099 (4) | −0.011 (3) | −0.013 (3) | 0.000 (4) |
| O1 | 0.110 (3) | 0.091 (3) | 0.092 (2) | −0.029 (2) | 0.034 (2) | −0.038 (2) |
| O2 | 0.126 (3) | 0.077 (2) | 0.122 (3) | 0.025 (2) | −0.010 (3) | 0.024 (2) |
| O3 | 0.167 (5) | 0.178 (5) | 0.062 (2) | 0.004 (4) | −0.019 (3) | 0.017 (3) |
| N1 | 0.0319 (12) | 0.0373 (13) | 0.0526 (16) | 0.0014 (10) | −0.0036 (11) | −0.0012 (12) |
| N2 | 0.0489 (15) | 0.0369 (14) | 0.0502 (16) | 0.0038 (12) | −0.0017 (12) | −0.0068 (12) |
| N3 | 0.0332 (12) | 0.0391 (14) | 0.0420 (14) | 0.0029 (10) | 0.0031 (10) | −0.0021 (11) |
| N4 | 0.0485 (15) | 0.0358 (13) | 0.0460 (15) | 0.0014 (11) | −0.0029 (12) | −0.0048 (12) |
| C1 | 0.0439 (17) | 0.0408 (17) | 0.0467 (17) | 0.0064 (13) | 0.0035 (14) | 0.0064 (14) |
| C2 | 0.0373 (15) | 0.0323 (15) | 0.0554 (19) | 0.0035 (12) | 0.0126 (13) | 0.0059 (13) |
| C3 | 0.070 (3) | 0.044 (2) | 0.084 (3) | 0.0058 (18) | 0.024 (2) | 0.0195 (19) |
| C4 | 0.0474 (19) | 0.053 (2) | 0.076 (3) | 0.0068 (16) | 0.0259 (18) | 0.0017 (19) |
| C5 | 0.0434 (17) | 0.0322 (16) | 0.071 (2) | −0.0017 (13) | 0.0040 (16) | −0.0052 (15) |
| C6 | 0.0467 (17) | 0.0487 (18) | 0.0371 (16) | 0.0131 (14) | 0.0080 (13) | 0.0041 (14) |
| C7 | 0.0417 (16) | 0.0352 (15) | 0.0479 (17) | 0.0068 (12) | 0.0133 (13) | 0.0069 (13) |
| C8 | 0.083 (3) | 0.045 (2) | 0.086 (3) | 0.007 (2) | 0.015 (2) | 0.022 (2) |
| C9 | 0.0448 (18) | 0.0321 (15) | 0.064 (2) | −0.0009 (13) | 0.0094 (16) | −0.0003 (14) |
| C10 | 0.049 (2) | 0.052 (2) | 0.077 (3) | 0.0090 (16) | 0.0259 (19) | −0.0037 (18) |
Geometric parameters (Å, °) top
| Cr—N3 | 2.090 (3) | C1—H1A | 0.9700 |
| Cr—N2 | 2.093 (3) | C1—H1B | 0.9700 |
| Cr—N4 | 2.094 (3) | C2—C4 | 1.522 (4) |
| Cr—N1 | 2.100 (3) | C2—C5 | 1.530 (5) |
| Cr—Cl2 | 2.3179 (9) | C2—C3 | 1.543 (5) |
| Cr—Cl1 | 2.3212 (9) | C3—H3A | 0.9600 |
| Cl3A—Cl3B | 0.629 (2) | C3—H3B | 0.9600 |
| Cl3A—O3 | 1.357 (4) | C3—H3C | 0.9600 |
| Cl3A—O2 | 1.368 (4) | C4—H4A | 0.9600 |
| Cl3A—O4A | 1.418 (6) | C4—H4B | 0.9600 |
| Cl3A—O1 | 1.447 (4) | C4—H4C | 0.9600 |
| Cl3B—O3 | 1.308 (5) | C5—H5A | 0.9700 |
| Cl3B—O1 | 1.374 (5) | C5—H5B | 0.9700 |
| Cl3B—O4B | 1.377 (9) | C6—C7 | 1.528 (5) |
| Cl3B—O2 | 1.453 (5) | C6—H6A | 0.9700 |
| N1—C1 | 1.490 (4) | C6—H6B | 0.9700 |
| N1—H1AN | 0.9000 | C7—C10 | 1.520 (5) |
| N1—H1BN | 0.9000 | C7—C9 | 1.528 (5) |
| N2—C5 | 1.492 (4) | C7—C8 | 1.537 (5) |
| N2—H2AN | 0.9000 | C8—H8A | 0.9600 |
| N2—H2BN | 0.9000 | C8—H8B | 0.9600 |
| N3—C6 | 1.481 (4) | C8—H8C | 0.9600 |
| N3—H3AN | 0.9000 | C9—H9A | 0.9700 |
| N3—H3BN | 0.9000 | C9—H9B | 0.9700 |
| N4—C9 | 1.488 (4) | C10—H10A | 0.9600 |
| N4—H4AN | 0.9000 | C10—H10B | 0.9600 |
| N4—H4BN | 0.9000 | C10—H10C | 0.9600 |
| C1—C2 | 1.530 (5) | | |
| | | |
| N3—Cr—N2 | 92.17 (10) | N1—C1—C2 | 114.6 (3) |
| N3—Cr—N4 | 88.82 (10) | N1—C1—H1A | 108.6 |
| N2—Cr—N4 | 179.01 (11) | C2—C1—H1A | 108.6 |
| N3—Cr—N1 | 179.46 (11) | N1—C1—H1B | 108.6 |
| N2—Cr—N1 | 87.78 (11) | C2—C1—H1B | 108.6 |
| N4—Cr—N1 | 91.24 (11) | H1A—C1—H1B | 107.6 |
| N3—Cr—Cl2 | 89.04 (8) | C4—C2—C5 | 111.9 (3) |
| N2—Cr—Cl2 | 92.25 (9) | C4—C2—C1 | 111.2 (3) |
| N4—Cr—Cl2 | 87.65 (9) | C5—C2—C1 | 111.7 (3) |
| N1—Cr—Cl2 | 90.42 (8) | C4—C2—C3 | 108.8 (3) |
| N3—Cr—Cl1 | 89.95 (8) | C5—C2—C3 | 106.4 (3) |
| N2—Cr—Cl1 | 88.28 (9) | C1—C2—C3 | 106.6 (3) |
| N4—Cr—Cl1 | 91.84 (9) | C2—C3—H3A | 109.5 |
| N1—Cr—Cl1 | 90.59 (8) | C2—C3—H3B | 109.5 |
| Cl2—Cr—Cl1 | 178.87 (4) | H3A—C3—H3B | 109.5 |
| O3—Cl3A—O2 | 119.8 (4) | C2—C3—H3C | 109.5 |
| Cl3B—Cl3A—O4A | 170.0 (5) | H3A—C3—H3C | 109.5 |
| O3—Cl3A—O4A | 98.6 (4) | H3B—C3—H3C | 109.5 |
| O2—Cl3A—O4A | 103.2 (4) | C2—C4—H4A | 109.5 |
| O3—Cl3A—O1 | 112.9 (3) | C2—C4—H4B | 109.5 |
| O2—Cl3A—O1 | 109.9 (3) | H4A—C4—H4B | 109.5 |
| O4A—Cl3A—O1 | 111.3 (3) | C2—C4—H4C | 109.5 |
| O3—Cl3A—O4B | 70.5 (4) | H4A—C4—H4C | 109.5 |
| O2—Cl3A—O4B | 77.1 (4) | H4B—C4—H4C | 109.5 |
| O4A—Cl3A—O4B | 166.7 (4) | N2—C5—C2 | 114.0 (3) |
| O1—Cl3A—O4B | 80.6 (3) | N2—C5—H5A | 108.8 |
| O3—Cl3B—O1 | 121.3 (4) | C2—C5—H5A | 108.8 |
| O3—Cl3B—O4B | 96.3 (5) | N2—C5—H5B | 108.8 |
| O1—Cl3B—O4B | 110.6 (4) | C2—C5—H5B | 108.8 |
| O3—Cl3B—O2 | 117.1 (4) | H5A—C5—H5B | 107.7 |
| O1—Cl3B—O2 | 109.2 (3) | N3—C6—C7 | 115.0 (3) |
| O4B—Cl3B—O2 | 98.8 (6) | N3—C6—H6A | 108.5 |
| O3—Cl3B—O4A | 74.2 (3) | C7—C6—H6A | 108.5 |
| O1—Cl3B—O4A | 85.3 (3) | N3—C6—H6B | 108.5 |
| O4B—Cl3B—O4A | 164.1 (5) | C7—C6—H6B | 108.5 |
| O2—Cl3B—O4A | 75.2 (3) | H6A—C6—H6B | 107.5 |
| C1—N1—Cr | 119.62 (19) | C10—C7—C6 | 111.3 (3) |
| C1—N1—H1AN | 107.4 | C10—C7—C9 | 111.2 (3) |
| Cr—N1—H1AN | 107.4 | C6—C7—C9 | 112.3 (3) |
| C1—N1—H1BN | 107.4 | C10—C7—C8 | 108.8 (3) |
| Cr—N1—H1BN | 107.4 | C6—C7—C8 | 106.7 (3) |
| H1AN—N1—H1BN | 106.9 | C9—C7—C8 | 106.2 (3) |
| C5—N2—Cr | 119.9 (2) | C7—C8—H8A | 109.5 |
| C5—N2—H2AN | 107.3 | C7—C8—H8B | 109.5 |
| Cr—N2—H2AN | 107.3 | H8A—C8—H8B | 109.5 |
| C5—N2—H2BN | 107.3 | C7—C8—H8C | 109.5 |
| Cr—N2—H2BN | 107.3 | H8A—C8—H8C | 109.5 |
| H2AN—N2—H2BN | 106.9 | H8B—C8—H8C | 109.5 |
| C6—N3—Cr | 119.9 (2) | N4—C9—C7 | 113.7 (3) |
| C6—N3—H3AN | 107.3 | N4—C9—H9A | 108.8 |
| Cr—N3—H3AN | 107.3 | C7—C9—H9A | 108.8 |
| C6—N3—H3BN | 107.3 | N4—C9—H9B | 108.8 |
| Cr—N3—H3BN | 107.3 | C7—C9—H9B | 108.8 |
| H3AN—N3—H3BN | 106.9 | H9A—C9—H9B | 107.7 |
| C9—N4—Cr | 119.9 (2) | C7—C10—H10A | 109.5 |
| C9—N4—H4AN | 107.4 | C7—C10—H10B | 109.5 |
| Cr—N4—H4AN | 107.4 | H10A—C10—H10B | 109.5 |
| C9—N4—H4BN | 107.4 | C7—C10—H10C | 109.5 |
| Cr—N4—H4BN | 107.4 | H10A—C10—H10C | 109.5 |
| H4AN—N4—H4BN | 106.9 | H10B—C10—H10C | 109.5 |
| | | |
| O2—Cl3A—Cl3B—O3 | −123.6 (4) | O1—Cl3A—O2—Cl3B | 67.3 (4) |
| O4A—Cl3A—Cl3B—O3 | 20 (3) | O4B—Cl3A—O2—Cl3B | −7.5 (5) |
| O1—Cl3A—Cl3B—O3 | 123.2 (4) | O3—Cl3B—O2—Cl3A | 67.5 (5) |
| O4B—Cl3A—Cl3B—O3 | −80 (3) | O1—Cl3B—O2—Cl3A | −75.3 (4) |
| O3—Cl3A—Cl3B—O1 | −123.2 (4) | O4B—Cl3B—O2—Cl3A | 169.2 (6) |
| O2—Cl3A—Cl3B—O1 | 113.2 (3) | O4A—Cl3B—O2—Cl3A | 4.3 (4) |
| O4A—Cl3A—Cl3B—O1 | −103 (3) | O1—Cl3B—O3—Cl3A | 76.7 (5) |
| O4B—Cl3A—Cl3B—O1 | 157 (3) | O4B—Cl3B—O3—Cl3A | −164.5 (7) |
| O3—Cl3A—Cl3B—O4B | 80 (3) | O2—Cl3B—O3—Cl3A | −61.3 (5) |
| O2—Cl3A—Cl3B—O4B | −43 (3) | O4A—Cl3B—O3—Cl3A | 2.4 (4) |
| O4A—Cl3A—Cl3B—O4B | 100 (4) | O2—Cl3A—O3—Cl3B | 72.8 (5) |
| O1—Cl3A—Cl3B—O4B | −157 (3) | O4A—Cl3A—O3—Cl3B | −176.6 (6) |
| O3—Cl3A—Cl3B—O2 | 123.6 (4) | O1—Cl3A—O3—Cl3B | −59.0 (5) |
| O4A—Cl3A—Cl3B—O2 | 143 (3) | O4B—Cl3A—O3—Cl3B | 11.2 (5) |
| O1—Cl3A—Cl3B—O2 | −113.2 (3) | N2—Cr—N1—C1 | −41.0 (2) |
| O4B—Cl3A—Cl3B—O2 | 43 (3) | N4—Cr—N1—C1 | 138.9 (2) |
| O3—Cl3A—Cl3B—O4A | −20 (3) | Cl2—Cr—N1—C1 | 51.3 (2) |
| O2—Cl3A—Cl3B—O4A | −143 (3) | Cl1—Cr—N1—C1 | −129.2 (2) |
| O1—Cl3A—Cl3B—O4A | 103 (3) | N3—Cr—N2—C5 | −137.9 (2) |
| O4B—Cl3A—Cl3B—O4A | −100 (4) | N1—Cr—N2—C5 | 41.6 (2) |
| O3—Cl3B—O4B—Cl3A | 78 (3) | Cl2—Cr—N2—C5 | −48.8 (2) |
| O1—Cl3B—O4B—Cl3A | −155 (3) | Cl1—Cr—N2—C5 | 132.2 (2) |
| O2—Cl3B—O4B—Cl3A | −41 (2) | N2—Cr—N3—C6 | −141.5 (2) |
| O4A—Cl3B—O4B—Cl3A | 25.7 (16) | N4—Cr—N3—C6 | 38.6 (2) |
| O3—Cl3A—O4B—Cl3B | −96 (3) | Cl2—Cr—N3—C6 | 126.3 (2) |
| O2—Cl3A—O4B—Cl3B | 135 (3) | Cl1—Cr—N3—C6 | −53.2 (2) |
| O4A—Cl3A—O4B—Cl3B | −132 (3) | N3—Cr—N4—C9 | −39.7 (2) |
| O1—Cl3A—O4B—Cl3B | 22 (2) | N1—Cr—N4—C9 | 140.8 (2) |
| O3—Cl3A—O4A—Cl3B | 19 (3) | Cl2—Cr—N4—C9 | −128.8 (2) |
| O2—Cl3A—O4A—Cl3B | 142 (3) | Cl1—Cr—N4—C9 | 50.2 (2) |
| O1—Cl3A—O4A—Cl3B | −100 (3) | Cr—N1—C1—C2 | 59.1 (3) |
| O4B—Cl3A—O4A—Cl3B | 53 (3) | N1—C1—C2—C4 | 60.6 (4) |
| O3—Cl3B—O4A—Cl3A | −160 (3) | N1—C1—C2—C5 | −65.2 (4) |
| O1—Cl3B—O4A—Cl3A | 76 (3) | N1—C1—C2—C3 | 179.0 (3) |
| O4B—Cl3B—O4A—Cl3A | −105 (4) | Cr—N2—C5—C2 | −60.0 (4) |
| O2—Cl3B—O4A—Cl3A | −35 (3) | C4—C2—C5—N2 | −60.1 (4) |
| O3—Cl3B—O1—Cl3A | −75.2 (5) | C1—C2—C5—N2 | 65.2 (4) |
| O4B—Cl3B—O1—Cl3A | 173.4 (8) | C3—C2—C5—N2 | −178.8 (3) |
| O2—Cl3B—O1—Cl3A | 65.8 (4) | Cr—N3—C6—C7 | −56.9 (3) |
| O4A—Cl3B—O1—Cl3A | −6.8 (4) | N3—C6—C7—C10 | −60.2 (4) |
| O3—Cl3A—O1—Cl3B | 59.8 (5) | N3—C6—C7—C9 | 65.2 (4) |
| O2—Cl3A—O1—Cl3B | −76.8 (5) | N3—C6—C7—C8 | −178.8 (3) |
| O4A—Cl3A—O1—Cl3B | 169.6 (6) | Cr—N4—C9—C7 | 58.7 (3) |
| O4B—Cl3A—O1—Cl3B | −4.3 (5) | C10—C7—C9—N4 | 59.8 (4) |
| O3—Cl3A—O2—Cl3B | −65.8 (5) | C6—C7—C9—N4 | −65.7 (4) |
| O4A—Cl3A—O2—Cl3B | −173.9 (6) | C8—C7—C9—N4 | 178.0 (3) |
Hydrogen-bond geometry (Å, °) top
| D—H···A | D—H | H···A | D···A | D—H···A |
| N1—H1BN···O2i | 0.90 | 2.29 | 3.030 (5) | 139 |
| N2—H2AN···O3ii | 0.90 | 2.23 | 3.099 (6) | 162 |
| N2—H2AN···O4Aii | 0.90 | 2.42 | 3.183 (6) | 143 |
| N2—H2BN···O4B | 0.90 | 2.36 | 3.217 (9) | 159 |
| N3—H3AN···O4Aii | 0.90 | 2.60 | 3.482 (7) | 168 |
| N4—H4BN···O2i | 0.90 | 2.14 | 3.030 (5) | 172 |
| N4—H4AN···O4Aiii | 0.90 | 2.54 | 3.403 (8) | 161 |
| N1—H1AN···Cl2iv | 0.90 | 2.68 | 3.525 (3) | 156 |
| N3—H3BN···Cl1ii | 0.90 | 2.69 | 3.533 (3) | 156 |
| Symmetry codes: (i) x, −y+1/2, z+1/2; (ii) x−1, y, z; (iii) x−1, −y+1/2, z+1/2; (iv) x+1, y, z. |
Table 1
Hydrogen-bond geometry (Å, °) top
| D—H···A | D—H | H···A | D···A | D—H···A |
| N1—H1BN···O2i | 0.90 | 2.29 | 3.030 (5) | 139 |
| N2—H2AN···O3ii | 0.90 | 2.23 | 3.099 (6) | 162 |
| N2—H2AN···O4Aii | 0.90 | 2.42 | 3.183 (6) | 143 |
| N2—H2BN···O4B | 0.90 | 2.36 | 3.217 (9) | 159 |
| N3—H3AN···O4Aii | 0.90 | 2.60 | 3.482 (7) | 168 |
| N4—H4BN···O2i | 0.90 | 2.14 | 3.030 (5) | 172 |
| N4—H4AN···O4Aiii | 0.90 | 2.54 | 3.403 (8) | 161 |
| N1—H1AN···Cl2iv | 0.90 | 2.68 | 3.525 (3) | 156 |
| N3—H3BN···Cl1ii | 0.90 | 2.69 | 3.533 (3) | 156 |
| Symmetry codes: (i) x, −y+1/2, z+1/2; (ii) x−1, y, z; (iii) x−1, −y+1/2, z+1/2; (iv) x+1, y, z. |
This work was supported by funds for 2008 of Andong National University.
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The [Cr(Me2tn)2L2]+ (Me2tn=2,2-dimethylpropane-1,3-diamine, L = monodentate) cation can exist as trans and cis geometric isomers. Especially, there are two possible conformations with respect to the six-membered rings in the trans isomer. The carbon atoms of the two chelate rings of the two conformers may be on the same side (syn conformer) or on opposite side (anti conformer) of the coordination plane (Choi et al., 2002; Choi et al., 2007). The syn or anti conformational stereochemistry of the six-membered chelate rings can not be readily determined by spectroscopic and physicochemical methods (Poon & Pun, 1980; Choi, 2000). In order to examine the influences of counter anions and packing forces of the crystal on the conformations, we have undertaken the X-ray structural analysis of trans-[Cr(Me2tn)2Cl2]ClO4, (I).
The title complex has approximate Ci symmetry. The two chelate rings in the complex cation are only in anti chair-chair conformation with respect to each other (Fig.1). The Cr—N and Cr—Cl bond length are very simillar to those of the trans-[Cr(Me2tn)2Cl2]Cl (Choi et al., 2007). However, the significant difference between these two crystal structures is the orientations with respect to the six-membered chelate rings of two Me2tn ligands in the same trans geometry. The complex is stabilized by the formation of the extensive hydrogen bonds (Table 1).