CRYSTAL STRUCTURES OF CIS- AND TRANS-DICHLORODIAMMINEPLATINUM(2)
CRYSTAL STRUCTURES OF CIS- AND TRANS-DICHLORODIAMMINEPLATINUM(2)
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DOI：
10.1039/j19660001609
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发表时间：
1966-01-01
期刊：
影响因子：
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通讯作者：
TRUTER, MR
中科院分区：
文献类型：
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作者：
MILBURN, GHW;TRUTER, MR
通过相同的实验和计算方法对这两种化合物进行了完整的三维X射线晶体结构分析。在120°± 5°K下收集观察结果，并对吸收强度进行校正。没有找到氢原子。通过最小二乘法进行各向异性精修后，顺式异构体的R为0·091，反式异构体的R为0·077。顺式化合物的Pt-Cl键长为2.33 ± 0.01 π，Pt-N键长为2.01 ± 0.04 π，反式化合物的Pt-Cl键长为2.32 ± 0.01 π，Pt-N键长为2.05 ± 0.04 π。顺式化合物中唯一与90°有显著差异的角是Cl-Pt-Cl = 91·9°± 0·4°。顺式二氯二氨铂晶体为三斜晶系，晶胞中有两个分子，a= 6·75，B= 6·55，c= 6·23 °，α= 92·2°，β= 84·6°，γ= 110·7°。分子在x/a π/4和π/4处近似平行于（100），铂-铂间距交替为3·372和3·409 π/4，垂直于分子平面。在低温下，反式异构体的结构与Porai-Koshits报道的室温下的结构基本相同。
Complete three-dimensional X-ray crystal structure analyses have been carried out on both compounds by identical experimental and computational methods. Observations were collected at 120°± 5°K and the intensities corrected for absorption. Hydrogen atoms were not located. After anisotropic refinement by least-squares, R is 0·091 for the cis-isomer and 0·077 for the trans-isomer. The bond lengths, corrected for rotational oscillation are Pt–Cl = 2·33 ± 0·01 Å and Pt–N = 2·01 ± 0·04 Å in the cis-compound, and Pt–Cl = 2·32 ± 0·01 Å and Pt–N = 2·05 ± 0·04 Å in the trans-compound. The only angle significantly different from 90° is Cl–Pt–Cl = 91·9°± 0·4° in the cis-compound.The crystals of cis-dichlorodiammineplatinum are triclinic with two molecules in a unit cell having a= 6·75, b= 6·55, c= 6·23 Å, α= 92·2°, β= 84·6°, and γ= 110·7°, and space group P. The molecules lie approximately parallel to (100) at x/a∼¼ and ∼¾, with platinum–platinum separations alternately 3·372 and 3·409 Å perpendicular to the molecular planes. At low temperature the structure of the trans-isomer is essentially the same as that at room temperature reported by Porai-Koshits.