A novel asymmetrical phosphine tetracobalt complex ofo-Mercaptophenol: Synthesis,structure, and properties of Co4mp4(Hmp)(PBu 3 n )3 (H2mp=o-Mercaptophenol) |
| |
Authors: | Yongjin Xu Beisheng Kang Xuetai Chen Yuanba Cai Yonghan Hu Jiaxi Lu |
| |
Affiliation: | (1) Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, and State Key Laboratory of Structural Chemistry, 350002 Fuzhou, Fujian, China |
| |
Abstract: | Complex Co4mp4(Hmp)(PBu3n)3 (1) (H2mp=o-Mercaptophenol) was obtained from the reaction of CoCl2 and H2mp in the presence of PBun3 and NaOMe with restricted oxidation. X-ray crystallographic data: triclinic, space group ,a=15.657(5) Å,b=20.469(8) Å,c=12.383(3) Å, =93.59(3)°, =112.45(2)°, =93.65(3)°,V=3648.7 Å3,Z=2,Dc=1.33 g/cm3;R=0.065. The molecule consists of four cobalt atoms unsymmetrically bridged by S or S and O atoms from four of the five mp ligands. The fifth mp is terminally chelated to Co(4) which is in a distorted trigonal bipyramidal geometry, while Co(1)-Co(3) are square pyramidal. Atom Co(2) is bonded to Co(1) and Co(3) (average distance 2.632 Å) with strong interactions while Co(4) is only loosely connected to Co(1) (3.402 Å) and Co(3) (2.956 Å) through oxygen bridges and a hydrogen bond. The different coordination environments O2S2P, S4P, and O4S of the cobalt atoms make the molecule highly asymmetrical. XPS fitting data confirm the difference of the Co atoms. FABMS data indicate the possible fragmentation routes. The complex is paramagnetic with eff=5.2 B. |
| |
Keywords: | Cobalt cluster structure tetranuclear |
本文献已被 SpringerLink 等数据库收录! |
|