On the crystal structures of some protonic complexes of oxo-ligands with tetrachloroauric acid, [(RO)nH][AuCl4] (R: Py, Ph3As; n: 1, 2), prepared from deuterated and non-deuterated solvent systems

被引:4
作者
Asaji, T [1 ]
Tajima, F
Hashimoto, M
机构
[1] Nihon Univ, Dept Chem, Coll Humanities & Sci, Setagaya Ku, Tokyo 1568550, Japan
[2] Kobe Univ, Dept Chem, Fac Sci, Nada Ku, Kobe, Hyogo 6578501, Japan
关键词
isotope effect; hydrogen bond; dimer; crystal structures; NQR; tetrachloroaurate(III);
D O I
10.1016/S0277-5387(02)01175-0
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The possible structural change of the dimeric cations [(RO)(n)H](+) (R = Py, Ph3As) in [(RO)(n)H][AuCl4] crystals due to the lowering of temperature or hydrogen -deuterium exchange was studied by Cl-35 NQR and powder X-ray diffraction measurements. Temperature dependence of the nuclear quadrupole resonance (NQR) frequencies of [(Ph3AsO)(2)H][AuCl4] and [(PYO)(2)H][AuCl4] suggested the symmetric hydrogen bond was retained down to 4.2 K. A crystalline polymorph of [(PyO)(2)H][AuCl4] (partial deuterate) was found to be stabilized preferably by the deuteration. The crystal structure determination of the partial deuterate by single crystal X-ray diffraction method revealed that the two pyridine N-oxide (PyO) moieties in the dimeric cation [(PyO)(2)H/D] are non-equivalent and the crystal structure is completely different from that of the non-deuterated salt. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2207 / 2213
页数:7
相关论文
共 15 条