Abstract
The reaction of lithium guanidinate, Li[(Pr2NC)-N-i(NAr)(2)] (1, Ar = 2,6-diisopropylphenyl) with [ScCl3] at 80 degrees C for eight days and [LaBr3] at 50 degrees C overnight, in THF yields the mono-guanidinate complexes [Sc((Pr2NC)-N-i (NAr)(2)(Cl)(mu-Cl)(LiCl-thf(2))] (2) and [La((Pr2NC)-N-i(NAr)(2)(mu-Br)(2)(LiBr-thf)(2)(LiBr-thf(2))] (3). X-ray analysis shows that due to the varying sizes of the central metal atoms, one or three solvated Li salts are coordinated to Sc or La, respectively. In dinuclear compound 2, Sc is five coordinate and has a square pyramidal geometry while in compound 3, La shows a distorted octahedral coordination. (C) 2017 Elsevier B.V. All rights reserved.