Preparation and characterisation of mononuclear Pd(II) complexes with 1,8-bis(3,5-dimethyl-1-pyrazolyl)-3,6-dithiaoctane (bddo) ligand: Spectroscopy studies and crystal structure of trans-[Pd(SCN)2(bddo)]
摘要:
Mononuclear palladium(II) complexes containing a pyrazole-thioether ligand, with general formula tralls-[Pd(X)(2)(bddo)] (X = CN- (1), SCN- (2) or N-3(-) (3); bddo = 1,8-bis(3,5-dimethyl-1-pyrazolyl)-3,6-dithiaoctane), have been prepared. Similar reactivity carried out with pyridine or triphenylphosphine has been assayed. When pyridine is used, a mixture of [Pd(bddo)(py)(2)](BF4)(2) ([4](BF4)(2)) and [Pd(bddo)](BF4)(2) is obtained. When triphenylphosphine is used, only [Pd(bddo)](BF4)(2) is obtained. The complexes have been characterised by elemental analyses. conductivity measurements, IR and NMR spectroscopies. X-ray crystal structure of trans-[Pd(SCN)(2)(bddo)] (2) is presented. In this complex the metal atom is coordinated by the two azine nitrogen atoms of the pyrazole rings and two SCN anions in trans disposition. (C) 2009 Elsevier Ltd. All rights reserved.