Y. Matsuo, and Kazushi Mashima, K. Tani
Jul 3, 2001
Citations
0
Influential Citations
78
Citations
Quality indicators
Journal
Organometallics
Abstract
Tridentate 2,5-bis(N-aryliminomethyl)pyrroles (1a, aryl = 4-methoxylphenyl; 1b, aryl = 4-methylphenyl; 1c, aryl = 2-methylphenyl; 1d, aryl = 2,6-dimethylphenyl; 1e, aryl = 2,6-diisopropylphenyl) have been prepared, and their reactions with a homoleptic Y{N(SiMe3)2}3 (2) have been investigated. The number of pyrrolyl ligands introduced to an yttrium atom can be controlled by varying the bulkiness of the ligand to give mono(pyrrolyl) (3), bis(pyrrolyl) (4), or tris(pyrrolyl) complexes (5) upon aminolysis. When bulky ligands such as 1d and 1e were used, a mono(pyrrolyl) complex Y(Xyl2-pyr){N(SiMe3)2}2 (3d, Xyl2-pyr = 2,5-bis{N-(2,6-dimethylphenyl)iminomethyl}pyrrolyl) and a bis(pyrrolyl) complex Y(DIP2-pyr)2{N(SiMe3)2} (4e, DIP2-pyr = 2,5-bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl) were predominantly obtained, respectively, with the release of hexamethyldisilazane. Both complexes adopt five-coordination geometries, a distorted trigonal bipyramidal mode for 3d and a distorted square-pyramidal one for 4...