metal-organic compounds
trans-Bis(tert-butylamine)dichloropalladium(II)
aChemistry and Nanotechnology, Institute for Materials Research, Cockcroft Building, University of Salford, Salford, M5 4WT, England
*Correspondence e-mail: N.M.Boag@salford.ac.uk
The trans-[PdCl2(NH2tBu)2], consists of two independent square-planar molecules, linked together in a hydrogen-bonding network, with the resultant alignment of the tert-butyl groups defining a two-dimensional layered structure approximately parallel to (001).
of the title complex,Comment
We have noted that the chemistry of tert-butylamine derivatives of palladium frequently differs from other primary amine complexes due to the steric bulk of the tert-butyl group. The availability of crystals of the title complex, (I), allowed comparison with other bis(primary amine)dichloro complexes of palladium to determine the structural consequences of steric bulk.
Complex (I) exists as two independent square-planar molecules in the The orientation of the tert-butylamine groups is such that both molecules are pseudo-centrosymmetric. Analysis of the 14 previously reported bis(primary amine)dichloropalladium(II) structures (Fletcher et al., 1996) gives averages of 2.300 (8) Å and 2.047 (9) Å for the Pd—Cl and the Pd—N bonds, respectively, with a mean deviation of the N—Pd—Cl angles of ca 1.4° from the ideal 90°. The Pd—Cl and Pd—N bond lengths in (I) range from 2.3015 (11) to 2.3072 (12) and 2.046 (4) to 2.058 (4) Å, respectively; this indicates that, in this complex, the bulky tert-butyl group has no obvious structural consequence, although the average N—Pd—Cl angle in complex (I) does show a significantly smaller deviation from the 90° required by ideal square-planar geometry [0.46° (molecule 1), 0.37° (molecule 2). The molecules are linked together in a hydrogen-bonding network, resulting in the formation of a two-dimensional layered structure, externally defined by the tert-butyl groups and approximately parallel to (001).
Experimental
Complex (I) crystallized from a dichloromethane/hexane solution of trans-[Pd(η1-C5H5)(NH2tBu)2Cl] and [Pd(η5-C5H5)(NH2tBu)Cl] and was spectroscopically identical to the material synthesized according to the literature method (Nakayama et al., 1984).
Crystal data
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Data collection
Refinement
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Methyl-H atoms were placed in calculated positions and subsequently constrained to an ideal geometry, with C—H distances of 0.97 Å and Uiso(H) = 1.5Ueq(C), with each group allowed to rotate freely about its C—C bond. The positions of the amine H atoms were identified from a difference Fourier map and allowed to refine freely with fixed isotropic displacement parameters; N—H = 0.79 (6)–0.92 (6) Å. The highest peak is located 1.21 Å from atom Cl21 and the deepest hole 1.47 Å from atom Cl12.
Data collection: XSCANS (Siemens, 1996); cell XSCANS; data reduction: XSCANS; program(s) used to solve structure: SHELXTL-Plus (Siemens, 1995); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL-Plus; software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).
Supporting information
10.1107/S1600536805030047/bv6033sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536805030047/bv6033Isup2.hkl
Complex (I) crystallized from a dichloromethane/hexane reaction mixture of trans-[Pd(η1-C5H5)(NH2But)2Cl] and [Pd(η5-C5H5)(NH2But)Cl] (amounts? ratio?) and was spectroscopically identical to the material synthesized according to the literature method (Nakayama et al., 1984).
The methyl-H atoms were placed in calculated positions and subsequently constrained to an ideal geometry, with C—H distances of 0.97 Å and Uiso(H) = 1.5Ueq(C), with each group allowed to rotate freely about its C—C bond. The positions of the amine-H atoms were identified from a difference Fourier map and allowed to refine freely with isotropic displacement parameters, N—H = 0.79 (6)–0.92 (6) Å.
Data collection: XSCANS (Siemens, 1996); cell
XSCANS; data reduction: XSCANS; program(s) used to solve structure: SHELXTL-Plus (Siemens, 1995); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL-Plus; software used to prepare material for publication: SHELXL97 (Sheldrick, 1997).Fig. 1. A view of the two independent molecules in (I). Displacement ellipsoids are drawn at the 50% probability level. Tert-butyl H atoms are excluded. |
[Pd(C4H11N)2Cl2] | Z = 4 |
Mr = 323.58 | F(000) = 656 |
Triclinic, P1 | Dx = 1.590 Mg m−3 |
a = 6.2357 (10) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 10.6500 (11) Å | Cell parameters from 34 reflections |
c = 20.472 (2) Å | θ = 5.1–12.5° |
α = 94.641 (8)° | µ = 1.73 mm−1 |
β = 90.978 (13)° | T = 223 K |
γ = 93.824 (11)° | Block, orange |
V = 1351.7 (3) Å3 | 0.6 × 0.3 × 0.3 mm |
Siemens P4 diffractometer | 5913 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.019 |
Graphite monochromator | θmax = 27.5°, θmin = 2.0° |
profile fitting of θ/2θ scans | h = −8→1 |
Absorption correction: ψ scan (XSCANS; Siemens, 1996). | k = −13→13 |
Tmin = 0.537, Tmax = 0.594 | l = −26→26 |
7873 measured reflections | 3 standard reflections every 97 reflections |
6177 independent reflections | intensity decay: 4% |
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)] = 0.038 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.098 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.23 | w = 1/[σ2(Fo2) + (0.0118P)2 + 6.285P] where P = (Fo2 + 2Fc2)/3 |
6177 reflections | (Δ/σ)max = 0.001 |
271 parameters | Δρmax = 1.01 e Å−3 |
0 restraints | Δρmin = −1.24 e Å−3 |
[Pd(C4H11N)2Cl2] | γ = 93.824 (11)° |
Mr = 323.58 | V = 1351.7 (3) Å3 |
Triclinic, P1 | Z = 4 |
a = 6.2357 (10) Å | Mo Kα radiation |
b = 10.6500 (11) Å | µ = 1.73 mm−1 |
c = 20.472 (2) Å | T = 223 K |
α = 94.641 (8)° | 0.6 × 0.3 × 0.3 mm |
β = 90.978 (13)° |
Siemens P4 diffractometer | 5913 reflections with I > 2σ(I) |
Absorption correction: ψ scan (XSCANS; Siemens, 1996). | Rint = 0.019 |
Tmin = 0.537, Tmax = 0.594 | 3 standard reflections every 97 reflections |
7873 measured reflections | intensity decay: 4% |
6177 independent reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.098 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.23 | Δρmax = 1.01 e Å−3 |
6177 reflections | Δρmin = −1.24 e Å−3 |
271 parameters |
Experimental. 13 reflections having 2θ between 8.98 and 45.57 degrees giving 231 ψ scans for parameter estimation, |
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. Least-squares planes (x,y,z in crystal coordinates) and deviations from them (* indicates atom used to define plane) − 1.7720 (0.0053) x − 8.6655 (0.0040) y + 11.1351 (0.0205) z = 0.5317 (0.0088) * −0.0014 (0.0012) Pd1 * 0.0119 (0.0012) Cl11 * 0.0118 (0.0012) Cl12 * −0.0111 (0.0017) N11 * −0.0112 (0.0017) N12 Rms deviation of fitted atoms = 0.0103 2.0951 (0.0059) x + 6.3911 (0.0067) y + 13.2261 (0.0209) z = 8.6109 (0.0031) Angle to previous plane (with approximate e.s.d.) = 73.56 (0.07) * 0.0010 (0.0012) Pd2 * −0.0139 (0.0013) Cl21 * −0.0138 (0.0013) Cl22 * 0.0133 (0.0018) N21 * 0.0133 (0.0018) N22 Rms deviation of fitted atoms = 0.0121 |
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 | ||
Pd1 | 0.65182 (5) | 0.13377 (3) | 0.255462 (16) | 0.02147 (8) | |
Cl11 | 0.39061 (17) | 0.24895 (11) | 0.30472 (6) | 0.0327 (2) | |
Cl12 | 0.91142 (17) | 0.01643 (11) | 0.20664 (6) | 0.0339 (2) | |
N11 | 0.8572 (6) | 0.1923 (4) | 0.33284 (19) | 0.0255 (7) | |
C11 | 0.8717 (8) | 0.1205 (5) | 0.3928 (3) | 0.0360 (11) | |
C111 | 0.9665 (12) | −0.0050 (6) | 0.3730 (3) | 0.0598 (17) | |
H11A | 0.8688 | −0.0554 | 0.3424 | 0.090* | |
H11B | 0.9874 | −0.0502 | 0.4117 | 0.090* | |
H11C | 1.1036 | 0.0106 | 0.3524 | 0.090* | |
C112 | 0.6494 (10) | 0.0987 (7) | 0.4208 (3) | 0.0522 (15) | |
H11D | 0.5930 | 0.1794 | 0.4340 | 0.078* | |
H11E | 0.6589 | 0.0498 | 0.4586 | 0.078* | |
H11F | 0.5543 | 0.0530 | 0.3877 | 0.078* | |
C113 | 1.0205 (10) | 0.1981 (7) | 0.4430 (3) | 0.0507 (15) | |
H11G | 1.1632 | 0.2087 | 0.4251 | 0.076* | |
H11H | 1.0280 | 0.1546 | 0.4827 | 0.076* | |
H11I | 0.9651 | 0.2802 | 0.4529 | 0.076* | |
N12 | 0.4460 (6) | 0.0777 (4) | 0.1782 (2) | 0.0261 (7) | |
C12 | 0.4354 (8) | 0.1510 (5) | 0.1187 (2) | 0.0336 (10) | |
C121 | 0.2900 (9) | 0.0729 (6) | 0.0676 (3) | 0.0480 (14) | |
H12G | 0.3488 | −0.0082 | 0.0572 | 0.072* | |
H12H | 0.2818 | 0.1173 | 0.0282 | 0.072* | |
H12I | 0.1472 | 0.0599 | 0.0850 | 0.072* | |
C122 | 0.6580 (9) | 0.1721 (7) | 0.0916 (3) | 0.0510 (15) | |
H12D | 0.7486 | 0.2243 | 0.1235 | 0.077* | |
H12E | 0.6487 | 0.2141 | 0.0514 | 0.077* | |
H12F | 0.7194 | 0.0914 | 0.0825 | 0.077* | |
C123 | 0.3396 (12) | 0.2755 (6) | 0.1380 (3) | 0.0532 (15) | |
H12A | 0.1990 | 0.2594 | 0.1564 | 0.080* | |
H12B | 0.3254 | 0.3223 | 0.0996 | 0.080* | |
H12C | 0.4329 | 0.3245 | 0.1704 | 0.080* | |
Pd2 | 0.64561 (5) | 0.63092 (3) | 0.243993 (17) | 0.02377 (9) | |
Cl21 | 0.39915 (19) | 0.76984 (12) | 0.21478 (7) | 0.0401 (3) | |
Cl22 | 0.88984 (19) | 0.49019 (12) | 0.27219 (7) | 0.0390 (3) | |
N21 | 0.4354 (6) | 0.5628 (4) | 0.3111 (2) | 0.0272 (8) | |
C21 | 0.4302 (8) | 0.6210 (5) | 0.3804 (2) | 0.0355 (10) | |
C211 | 0.2889 (10) | 0.5330 (6) | 0.4198 (3) | 0.0493 (14) | |
H21D | 0.1460 | 0.5212 | 0.3998 | 0.074* | |
H21E | 0.2797 | 0.5701 | 0.4644 | 0.074* | |
H21F | 0.3512 | 0.4520 | 0.4201 | 0.074* | |
C212 | 0.3290 (14) | 0.7483 (6) | 0.3792 (4) | 0.067 (2) | |
H21G | 0.4222 | 0.8058 | 0.3563 | 0.101* | |
H21H | 0.3108 | 0.7836 | 0.4238 | 0.101* | |
H21I | 0.1900 | 0.7358 | 0.3568 | 0.101* | |
C213 | 0.6562 (11) | 0.6364 (8) | 0.4096 (3) | 0.068 (2) | |
H21A | 0.7171 | 0.5548 | 0.4080 | 0.101* | |
H21B | 0.6519 | 0.6711 | 0.4548 | 0.101* | |
H21C | 0.7442 | 0.6931 | 0.3847 | 0.101* | |
N22 | 0.8550 (6) | 0.7021 (4) | 0.1774 (2) | 0.0273 (8) | |
C22 | 0.8660 (8) | 0.6480 (5) | 0.1078 (2) | 0.0357 (10) | |
C221 | 1.0054 (10) | 0.7391 (6) | 0.0706 (3) | 0.0456 (13) | |
H22A | 0.9351 | 0.8172 | 0.0684 | 0.068* | |
H22B | 1.0265 | 0.7018 | 0.0266 | 0.068* | |
H22C | 1.1437 | 0.7565 | 0.0931 | 0.068* | |
C222 | 0.6405 (11) | 0.6331 (9) | 0.0775 (3) | 0.069 (2) | |
H22G | 0.5536 | 0.5717 | 0.0998 | 0.103* | |
H22H | 0.6479 | 0.6044 | 0.0314 | 0.103* | |
H22I | 0.5762 | 0.7137 | 0.0818 | 0.103* | |
C223 | 0.9687 (14) | 0.5218 (6) | 0.1074 (4) | 0.068 (2) | |
H22D | 1.1079 | 0.5341 | 0.1297 | 0.102* | |
H22E | 0.9867 | 0.4883 | 0.0625 | 0.102* | |
H22F | 0.8767 | 0.4628 | 0.1298 | 0.102* | |
H111 | 0.818 (9) | 0.261 (5) | 0.340 (3) | 0.030* | |
H112 | 0.977 (9) | 0.197 (5) | 0.318 (3) | 0.030* | |
H121 | 0.479 (9) | 0.005 (5) | 0.170 (3) | 0.030* | |
H122 | 0.323 (9) | 0.060 (5) | 0.193 (3) | 0.030* | |
H211 | 0.463 (9) | 0.492 (5) | 0.312 (3) | 0.030* | |
H212 | 0.317 (9) | 0.572 (5) | 0.292 (3) | 0.030* | |
H221 | 0.976 (9) | 0.705 (5) | 0.191 (3) | 0.030* | |
H222 | 0.825 (9) | 0.785 (5) | 0.174 (3) | 0.030* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pd1 | 0.01610 (15) | 0.01825 (15) | 0.03003 (17) | 0.00218 (11) | 0.00305 (11) | 0.00047 (11) |
Cl11 | 0.0222 (5) | 0.0288 (5) | 0.0466 (6) | 0.0052 (4) | 0.0071 (4) | −0.0046 (5) |
Cl12 | 0.0218 (5) | 0.0307 (5) | 0.0480 (7) | 0.0060 (4) | 0.0049 (4) | −0.0085 (5) |
N11 | 0.0186 (17) | 0.0244 (18) | 0.033 (2) | 0.0002 (14) | 0.0026 (14) | 0.0024 (15) |
C11 | 0.033 (3) | 0.039 (3) | 0.037 (3) | 0.001 (2) | 0.001 (2) | 0.010 (2) |
C111 | 0.076 (5) | 0.045 (3) | 0.063 (4) | 0.018 (3) | −0.001 (3) | 0.023 (3) |
C112 | 0.038 (3) | 0.071 (4) | 0.048 (3) | −0.008 (3) | 0.007 (2) | 0.019 (3) |
C113 | 0.041 (3) | 0.073 (4) | 0.037 (3) | −0.005 (3) | −0.002 (2) | 0.006 (3) |
N12 | 0.0205 (18) | 0.0236 (18) | 0.034 (2) | 0.0014 (14) | 0.0037 (15) | 0.0019 (15) |
C12 | 0.030 (2) | 0.038 (3) | 0.033 (2) | 0.002 (2) | 0.0006 (19) | 0.006 (2) |
C121 | 0.040 (3) | 0.065 (4) | 0.038 (3) | −0.003 (3) | −0.004 (2) | 0.005 (3) |
C122 | 0.037 (3) | 0.070 (4) | 0.048 (3) | −0.006 (3) | 0.007 (2) | 0.020 (3) |
C123 | 0.069 (4) | 0.042 (3) | 0.052 (3) | 0.021 (3) | 0.001 (3) | 0.016 (3) |
Pd2 | 0.01797 (15) | 0.02036 (15) | 0.03378 (18) | 0.00259 (11) | 0.00199 (12) | 0.00589 (12) |
Cl21 | 0.0238 (5) | 0.0368 (6) | 0.0638 (8) | 0.0094 (4) | 0.0054 (5) | 0.0220 (6) |
Cl22 | 0.0270 (5) | 0.0363 (6) | 0.0575 (8) | 0.0113 (5) | 0.0064 (5) | 0.0196 (5) |
N21 | 0.0239 (19) | 0.0220 (18) | 0.037 (2) | 0.0051 (15) | 0.0051 (15) | 0.0057 (15) |
C21 | 0.036 (3) | 0.034 (3) | 0.036 (3) | 0.002 (2) | 0.004 (2) | 0.000 (2) |
C211 | 0.052 (3) | 0.056 (4) | 0.041 (3) | 0.000 (3) | 0.014 (3) | 0.004 (3) |
C212 | 0.105 (6) | 0.037 (3) | 0.060 (4) | 0.022 (4) | 0.019 (4) | −0.005 (3) |
C213 | 0.045 (4) | 0.105 (6) | 0.048 (4) | −0.012 (4) | −0.004 (3) | −0.011 (4) |
N22 | 0.0202 (18) | 0.0263 (19) | 0.036 (2) | 0.0006 (15) | 0.0027 (15) | 0.0068 (15) |
C22 | 0.036 (3) | 0.036 (3) | 0.034 (2) | 0.001 (2) | 0.005 (2) | 0.001 (2) |
C221 | 0.044 (3) | 0.052 (3) | 0.042 (3) | −0.002 (3) | 0.009 (2) | 0.013 (2) |
C222 | 0.044 (4) | 0.109 (6) | 0.048 (4) | −0.024 (4) | −0.004 (3) | −0.005 (4) |
C223 | 0.108 (6) | 0.040 (3) | 0.057 (4) | 0.018 (4) | 0.027 (4) | −0.002 (3) |
Pd1—N12 | 2.046 (4) | Pd2—N21 | 2.057 (4) |
Pd1—N11 | 2.050 (4) | Pd2—N22 | 2.058 (4) |
Pd1—Cl11 | 2.3015 (11) | Pd2—Cl22 | 2.3051 (12) |
Pd1—Cl12 | 2.3030 (11) | Pd2—Cl21 | 2.3072 (12) |
N11—C11 | 1.501 (6) | N21—C21 | 1.502 (6) |
N11—H111 | 0.79 (6) | N21—H211 | 0.79 (6) |
N11—H112 | 0.81 (6) | N21—H212 | 0.84 (6) |
C11—C112 | 1.520 (7) | C21—C213 | 1.515 (8) |
C11—C113 | 1.525 (8) | C21—C211 | 1.530 (7) |
C11—C111 | 1.526 (8) | C21—C212 | 1.535 (8) |
C111—H11A | 0.9700 | C211—H21D | 0.9700 |
C111—H11B | 0.9700 | C211—H21E | 0.9700 |
C111—H11C | 0.9700 | C211—H21F | 0.9700 |
C112—H11D | 0.9700 | C212—H21G | 0.9700 |
C112—H11E | 0.9700 | C212—H21H | 0.9700 |
C112—H11F | 0.9700 | C212—H21I | 0.9700 |
C113—H11G | 0.9700 | C213—H21A | 0.9700 |
C113—H11H | 0.9700 | C213—H21B | 0.9700 |
C113—H11I | 0.9700 | C213—H21C | 0.9700 |
N12—C12 | 1.502 (6) | N22—C22 | 1.497 (6) |
N12—H121 | 0.82 (6) | N22—H221 | 0.80 (6) |
N12—H122 | 0.84 (6) | N22—H222 | 0.92 (6) |
C12—C122 | 1.514 (7) | C22—C221 | 1.519 (7) |
C12—C123 | 1.516 (7) | C22—C222 | 1.521 (8) |
C12—C121 | 1.528 (7) | C22—C223 | 1.526 (8) |
C121—H12G | 0.9700 | C221—H22A | 0.9700 |
C121—H12H | 0.9700 | C221—H22B | 0.9700 |
C121—H12I | 0.9700 | C221—H22C | 0.9700 |
C122—H12D | 0.9700 | C222—H22G | 0.9700 |
C122—H12E | 0.9700 | C222—H22H | 0.9700 |
C122—H12F | 0.9700 | C222—H22I | 0.9700 |
C123—H12A | 0.9700 | C223—H22D | 0.9700 |
C123—H12B | 0.9700 | C223—H22E | 0.9700 |
C123—H12C | 0.9700 | C223—H22F | 0.9700 |
N12—Pd1—N11 | 179.27 (16) | N21—Pd2—N22 | 179.06 (16) |
N12—Pd1—Cl11 | 90.17 (12) | N21—Pd2—Cl22 | 89.93 (12) |
N11—Pd1—Cl11 | 89.35 (12) | N22—Pd2—Cl22 | 90.71 (12) |
N12—Pd1—Cl12 | 89.74 (12) | N21—Pd2—Cl21 | 90.04 (12) |
N11—Pd1—Cl12 | 90.74 (12) | N22—Pd2—Cl21 | 89.32 (12) |
Cl11—Pd1—Cl12 | 179.34 (5) | Cl22—Pd2—Cl21 | 179.26 (6) |
C11—N11—Pd1 | 122.4 (3) | C21—N21—Pd2 | 122.1 (3) |
C11—N11—H111 | 114 (4) | C21—N21—H211 | 109 (4) |
Pd1—N11—H111 | 98 (4) | Pd2—N21—H211 | 103 (4) |
C11—N11—H112 | 106 (4) | C21—N21—H212 | 109 (4) |
Pd1—N11—H112 | 107 (4) | Pd2—N21—H212 | 101 (4) |
H111—N11—H112 | 109 (5) | H211—N21—H212 | 113 (5) |
N11—C11—C112 | 109.8 (4) | N21—C21—C213 | 109.6 (4) |
N11—C11—C113 | 108.2 (4) | N21—C21—C211 | 108.1 (4) |
C112—C11—C113 | 110.2 (5) | C213—C21—C211 | 110.0 (5) |
N11—C11—C111 | 108.2 (4) | N21—C21—C212 | 108.1 (5) |
C112—C11—C111 | 110.6 (5) | C213—C21—C212 | 111.7 (6) |
C113—C11—C111 | 109.8 (5) | C211—C21—C212 | 109.3 (5) |
C11—C111—H11A | 109.5 | C21—C211—H21D | 109.5 |
C11—C111—H11B | 109.5 | C21—C211—H21E | 109.5 |
H11A—C111—H11B | 109.5 | H21D—C211—H21E | 109.5 |
C11—C111—H11C | 109.5 | C21—C211—H21F | 109.5 |
H11A—C111—H11C | 109.5 | H21D—C211—H21F | 109.5 |
H11B—C111—H11C | 109.5 | H21E—C211—H21F | 109.5 |
C11—C112—H11D | 109.5 | C21—C212—H21G | 109.5 |
C11—C112—H11E | 109.5 | C21—C212—H21H | 109.5 |
H11D—C112—H11E | 109.5 | H21G—C212—H21H | 109.5 |
C11—C112—H11F | 109.5 | C21—C212—H21I | 109.5 |
H11D—C112—H11F | 109.5 | H21G—C212—H21I | 109.5 |
H11E—C112—H11F | 109.5 | H21H—C212—H21I | 109.5 |
C11—C113—H11G | 109.5 | C21—C213—H21A | 109.5 |
C11—C113—H11H | 109.5 | C21—C213—H21B | 109.5 |
H11G—C113—H11H | 109.5 | H21A—C213—H21B | 109.5 |
C11—C113—H11I | 109.5 | C21—C213—H21C | 109.5 |
H11G—C113—H11I | 109.5 | H21A—C213—H21C | 109.5 |
H11H—C113—H11I | 109.5 | H21B—C213—H21C | 109.5 |
C12—N12—Pd1 | 121.9 (3) | C22—N22—Pd2 | 123.5 (3) |
C12—N12—H121 | 114 (4) | C22—N22—H221 | 105 (4) |
Pd1—N12—H121 | 100 (4) | Pd2—N22—H221 | 111 (4) |
C12—N12—H122 | 112 (4) | C22—N22—H222 | 104 (3) |
Pd1—N12—H122 | 109 (4) | Pd2—N22—H222 | 107 (3) |
H121—N12—H122 | 97 (5) | H221—N22—H222 | 105 (5) |
N12—C12—C122 | 109.9 (4) | N22—C22—C221 | 108.3 (4) |
N12—C12—C123 | 108.6 (4) | N22—C22—C222 | 109.1 (5) |
C122—C12—C123 | 111.2 (5) | C221—C22—C222 | 109.5 (5) |
N12—C12—C121 | 107.5 (4) | N22—C22—C223 | 108.4 (5) |
C122—C12—C121 | 109.6 (5) | C221—C22—C223 | 109.6 (5) |
C123—C12—C121 | 110.0 (5) | C222—C22—C223 | 111.8 (6) |
C12—C121—H12G | 109.5 | C22—C221—H22A | 109.5 |
C12—C121—H12H | 109.5 | C22—C221—H22B | 109.5 |
H12G—C121—H12H | 109.5 | H22A—C221—H22B | 109.5 |
C12—C121—H12I | 109.5 | C22—C221—H22C | 109.5 |
H12G—C121—H12I | 109.5 | H22A—C221—H22C | 109.5 |
H12H—C121—H12I | 109.5 | H22B—C221—H22C | 109.5 |
C12—C122—H12D | 109.5 | C22—C222—H22G | 109.5 |
C12—C122—H12E | 109.5 | C22—C222—H22H | 109.5 |
H12D—C122—H12E | 109.5 | H22G—C222—H22H | 109.5 |
C12—C122—H12F | 109.5 | C22—C222—H22I | 109.5 |
H12D—C122—H12F | 109.5 | H22G—C222—H22I | 109.5 |
H12E—C122—H12F | 109.5 | H22H—C222—H22I | 109.5 |
C12—C123—H12A | 109.5 | C22—C223—H22D | 109.5 |
C12—C123—H12B | 109.5 | C22—C223—H22E | 109.5 |
H12A—C123—H12B | 109.5 | H22D—C223—H22E | 109.5 |
C12—C123—H12C | 109.5 | C22—C223—H22F | 109.5 |
H12A—C123—H12C | 109.5 | H22D—C223—H22F | 109.5 |
H12B—C123—H12C | 109.5 | H22E—C223—H22F | 109.5 |
N12—Pd1—N11—C11 | 139 (12) | N22—Pd2—N21—C21 | −41 (10) |
Cl11—Pd1—N11—C11 | 89.7 (4) | Cl22—Pd2—N21—C21 | 92.4 (4) |
Cl12—Pd1—N11—C11 | −89.6 (4) | Cl21—Pd2—N21—C21 | −88.4 (4) |
Pd1—N11—C11—C112 | −53.4 (6) | Pd2—N21—C21—C213 | −49.4 (6) |
Pd1—N11—C11—C113 | −173.8 (4) | Pd2—N21—C21—C211 | −169.2 (4) |
Pd1—N11—C11—C111 | 67.3 (5) | Pd2—N21—C21—C212 | 72.6 (5) |
N11—Pd1—N12—C12 | 42 (12) | N21—Pd2—N22—C22 | −139 (10) |
Cl11—Pd1—N12—C12 | 90.8 (3) | Cl22—Pd2—N22—C22 | 87.5 (4) |
Cl12—Pd1—N12—C12 | −89.9 (3) | Cl21—Pd2—N22—C22 | −91.8 (4) |
Pd1—N12—C12—C122 | 52.9 (5) | Pd2—N22—C22—C221 | 169.1 (3) |
Pd1—N12—C12—C123 | −68.9 (5) | Pd2—N22—C22—C222 | 50.0 (6) |
Pd1—N12—C12—C121 | 172.1 (3) | Pd2—N22—C22—C223 | −72.0 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N11—H111···Cl22 | 0.79 (6) | 2.92 (6) | 3.494 (4) | 132 (5) |
N11—H112···Cl11i | 0.81 (6) | 2.62 (6) | 3.408 (4) | 163 (5) |
N12—H121···Cl21ii | 0.82 (6) | 2.75 (6) | 3.416 (4) | 140 (5) |
N12—H122···Cl12iii | 0.84 (6) | 2.60 (6) | 3.423 (4) | 165 (5) |
N21—H211···Cl11 | 0.79 (6) | 2.59 (6) | 3.327 (4) | 157 (5) |
N21—H212···Cl22iii | 0.84 (6) | 2.76 (6) | 3.502 (4) | 148 (5) |
N22—H221···Cl21i | 0.80 (6) | 2.71 (6) | 3.481 (4) | 164 (5) |
N22—H222···Cl12iv | 0.92 (6) | 2.52 (6) | 3.347 (4) | 149 (4) |
Symmetry codes: (i) x+1, y, z; (ii) x, y−1, z; (iii) x−1, y, z; (iv) x, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | [Pd(C4H11N)2Cl2] |
Mr | 323.58 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 223 |
a, b, c (Å) | 6.2357 (10), 10.6500 (11), 20.472 (2) |
α, β, γ (°) | 94.641 (8), 90.978 (13), 93.824 (11) |
V (Å3) | 1351.7 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.73 |
Crystal size (mm) | 0.6 × 0.3 × 0.3 |
Data collection | |
Diffractometer | Siemens P4 diffractometer |
Absorption correction | ψ scan (XSCANS; Siemens, 1996). |
Tmin, Tmax | 0.537, 0.594 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7873, 6177, 5913 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.098, 1.23 |
No. of reflections | 6177 |
No. of parameters | 271 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 1.01, −1.24 |
Computer programs: XSCANS (Siemens, 1996), XSCANS, SHELXTL-Plus (Siemens, 1995), SHELXL97 (Sheldrick, 1997), SHELXTL-Plus.
Pd1—N12 | 2.046 (4) | Pd2—N21 | 2.057 (4) |
Pd1—N11 | 2.050 (4) | Pd2—N22 | 2.058 (4) |
Pd1—Cl11 | 2.3015 (11) | Pd2—Cl22 | 2.3051 (12) |
Pd1—Cl12 | 2.3030 (11) | Pd2—Cl21 | 2.3072 (12) |
N12—Pd1—N11 | 179.27 (16) | N21—Pd2—N22 | 179.06 (16) |
N12—Pd1—Cl11 | 90.17 (12) | N21—Pd2—Cl22 | 89.93 (12) |
N11—Pd1—Cl11 | 89.35 (12) | N22—Pd2—Cl22 | 90.71 (12) |
N12—Pd1—Cl12 | 89.74 (12) | N21—Pd2—Cl21 | 90.04 (12) |
N11—Pd1—Cl12 | 90.74 (12) | N22—Pd2—Cl21 | 89.32 (12) |
Cl11—Pd1—Cl12 | 179.34 (5) | Cl22—Pd2—Cl21 | 179.26 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N11—H112···Cl11i | 0.81 (6) | 2.62 (6) | 3.408 (4) | 163 (5) |
N12—H121···Cl21ii | 0.82 (6) | 2.75 (6) | 3.416 (4) | 140 (5) |
N12—H122···Cl12iii | 0.84 (6) | 2.60 (6) | 3.423 (4) | 165 (5) |
N21—H211···Cl11 | 0.79 (6) | 2.59 (6) | 3.327 (4) | 157 (5) |
N21—H212···Cl22iii | 0.84 (6) | 2.76 (6) | 3.502 (4) | 148 (5) |
N22—H221···Cl21i | 0.80 (6) | 2.71 (6) | 3.481 (4) | 164 (5) |
N22—H222···Cl12iv | 0.92 (6) | 2.52 (6) | 3.347 (4) | 149 (4) |
Symmetry codes: (i) x+1, y, z; (ii) x, y−1, z; (iii) x−1, y, z; (iv) x, y+1, z. |
Acknowledgements
We thank the EPSRC for a studentship and the SCI for a Messel Scholarship (SC). We acknowledge the use of the EPSRC's Chemical Database Service at Daresbury.
References
Fletcher, D. A., McMeeking, R. F. & Parkin, D. (1996). J. Chem. Inf. Comput. Sci. 36, 746–749. CrossRef CAS Web of Science Google Scholar
Nakayama, K., Komorita, T. & Shimura, Y. (1984). Bull. Chem. Soc. Jpn, 57, 1336–1347. CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (1997). SHELXS97 and SHELXL97. University of Göttingen, Germany. Google Scholar
Siemens (1995). SHELXTL-Plus. Version 5.03. Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA. Google Scholar
Siemens (1996), XSCANS. Version 2.20, Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA. Google Scholar
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We have noted that the chemistry of tert-butylamine derivatives of palladium frequently differs due to the steric bulk of the tert-butyl group. The availability of crystals of the title complex, (I), allowed comparison with other bis(primary amine)dichloride complexes of palladium to determine structural consequences of steric bulk.
Complex (I) exists as two independent square-planar molecules in the unit cell. The orientation of the tert-butylamine groups is such that both molecules are pseudo-centrosymmetric. Analysis of the 14 previous bis(primary amine)dichloride palladium structures (Fletcher et al., 1996) gives averages of 2.300 (8) Å and 2.047 (9) Å for the Pd—Cl and the Pd—N bonds, respectively, with a mean deviation of the N—Pd—Cl angles of ca 1.4° from the ideal 90°. The Pd—Cl and Pd—N bond lengths in (I) range from 2.3015 (11) to 2.3072 (12) and 2.046 (4) to 2.058 (4) Å, respectively; this indicates that, in this complex, the bulky tert-butyl group has no obvious structural consequence, although complex (I) does show a significantly smaller deviation from the 90° required by ideal square-planar geometry, [0.455° (molecule 1) 0.375° (molecule 2)]. The molecules are linked together in a hydrogen-bonding network, resulting in the formation of a two-dimensional layered structure, externally defined by the tert-butyl groups and approximately parallel to the c face.