PGSE diffusion studies on chelating phosphine complexes of ruthenium(II). Solvent dependence and ion pairing

被引:49
作者
Kumar, PGA
Pregosin, PS [1 ]
Goicoechea, JM
Whittlesey, MK
机构
[1] ETH Zentrum, Inorgan Chem Lab, CH-8093 Zurich, Switzerland
[2] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England
关键词
D O I
10.1021/om030145p
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
PGSE H-1 and F-19 diffusion data, D values, and H-1,F-19 HOESY NXIR spectra for a series of [RuCl(p-cymene)(BINAP)]X salts, 2a-f, have been recorded in CD2Cl2 (X = BF4- (2a), CF3 SO3- (2b), BArF- (2c), PF6- (2d), SbF6- (2e), Cl- (2f)). The solvent dependence of the D values for 2a-c in methanol, chloroform, dichloromethane, and acetone and the resulting ion-pairing effects are discussed. On the basis of HOESY data, it is suggested that small anions in chloroform solution approach the ruthenium atom from the side of the molecule remote from the chloride and slightly below the complexed arene. PGSE diffusion data for the Ru-aqua complexes [Ru(H2O)(3)(CO)(dppe)]X-2 (X = BF4- (3a), CF3SO3- (3b), SbF6- (3c), N(O2SCF3)(2)(-) (3d)) are reported. The observed D values for 3a-d partially reflect hydrogen bonding from complexed water to the anions.
引用
收藏
页码:2956 / 2960
页数:5
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