(1,10-phenanthroline)bis(piperidinecarbodithioato-S,S')zinc(II), [Zn(pipdtc)(2)(1,10-phen)] (1) and (2,2'-bipyridine)bis(piperidinecarbodithioatao-S,S')zinc(II), [Zn(pipdtc)(2)(bipy)] (2) adducts were prepared and the crystal structure of 2 is reported. The Zn-S distances in 2 are longer than those in Zn(dtc)(2) complexes. The presence of an additional neutral ligand causes an increase of the Zn-S bond lengths. S2p binding energies show a significant reduction in value compared to the parent dithiocarbmate [Zn(pipdtc)(2)](3), indicating the weakening of the Zn-S bond on adduct formation. The observed reduction in binding energy is due to the increased electron density on the metal in the adducts. The cyclic voltammetric study on the complexes also show an increase of electron density on zinc in the adducts compared to Zn(pipdtc)(2). The S-Zn-S angle in the adduct shows a reduction due to increased coordination around zinc, The thioureide C-N distance of 1.343(13) Angstrom in compound 2 is in line with the nu C-N observed at 1469 cm(-1). (C) 1999 Elsevier Science Ltd. All rights reserved.
下列中文文本是所给英文内容的翻译:
(1,10-
邻菲罗啉)双(
哌啶羰基二
硫代酸-S,S')
锌(II)配合物,[Zn(pipdtc)₂(1,10-phen)](1)和(
2,2'-联吡啶)双(
哌啶羰基二
硫代酸-S,S')
锌(II)配合物,[Zn(pipdtc)₂(bipy)](2)已被制备,且报道了配合物2的晶体结构。配合物2中的Zn-S键长度比Zn(dtc)₂配合物中的Zn-S键长更长。额外中性
配体的存在导致Zn-S键长增加。S2p结合能的值与母体二
硫代
碳酸盐[Zn(pipdtc)₂](3)相比有显著降低,表明在形成加成配合物后,Zn-S键强度减弱。结合能的降低是由于加成配合物中
金属上的电子密度增加所致。对配合物进行的环伏安研究还表明,与Zn(pipdtc)₂相比,加成配合物中
锌上的电子密度增加。由于
锌周围配位的增加,加成物中S-Zn-S键角减小。化合物2中
硫脲C-N键长为1.343(13)Å,与在1469 cm⁻¹处观测到的C-N一致。
版权信息:(C) 1999 Elsevier Science Ltd. 保留所有权利。