On the nuclearity of tricarbonylrhenium(I) complexes with N,O,O-donating Schiff bases derived from amino acids
作者:Sérgio M. Soares、Sebastião S. Lemos、Maria José A. Sales、Robert A. Burrow
DOI:10.1016/j.jorganchem.2013.10.027
日期:2014.1
The reaction of [ReBr(CO)(5)] with AgOOCCH3 followed with N-(2-hydroxynaphtalidene)-beta-alanine (bala2hnH(2)); NEt4[ReBr3(CO)(3)] with the potassium salt of N-(2-hydroxynaphtalidene)-(D,L)-beta-phenylalanine (bphala2hnH(2)), or with N-(5-bromine-2-hydroxysalicylidene)-(D,L)-beta-phenylalanine (bphalabrsalH(2)) gave the complexes [fac-Re(bala2hnH)(CO)(3)}(2)] (1), (H3O)[Re(fac-bphala2hn)(CO)(3)]center dot CHCl3 center dot H2O (2), K[fac-Re(bphala2hn)(CO)(3)]center dot 1/3 CHCl3 center dot 2H(2)O (3) and K[fac-Re(bphalabrsal)(CO)(3)]center dot 2H(2)O (4), respectively. Single crystal X-ray crystallography showed that the neutral dinuclear complex 1 is centrosymmetric with each rhenium(I) atom having an octahedral coordination geometry comprising of three terminal carbonyl ligands, in a fac configuration, and both ligands bala2hnH are bridging and chelating the two rhenium(I) centers. In the anionic mononuclear complexes 2 and 3, bphala2hn(2-) acts as a N,O,O tridentate ligand to the fac-Re(CO)(3)}(+) fragment giving rise an octahedral geometry around the rhenium(I) atom. (C) 2013 Elsevier B. V. All rights reserved.