The synthesis and crystal structure of Sn(C 6H 4CH 2NMe 2- o) 2, and its reaction with Co(η 5-C 5H 5)(η 2-C 2H 4) 2

Abstract

Treatment of SnCp 2 or SnCl 2 with o-LiC 6H 4CH 2NMe 2 gave the new monomeric stannylene Sn(C 6H 4CH 2NMe 2- o) 2 ( 1). The reaction between Co(η 5-C 5H 5)(η 2-C 2H 4) 2 and the stannylene 1 yielded Co(η 5-C 5H 5)(η 2-C 2H 4)[Sn(C 6H 4CH 2NMe 2- o) 2] ( 3). The crystal structure of 1 and 3 has been determined by X-ray diffraction. 1: C 18H 24N 2Sn, a 10.096(1) Å, b 10.056(1) Å, c 17.665(1) Å, β 95.37(1)°, space group P2 1/ c (No. 14), Z = 4, monoclinic; R = 0.031 for 3402 observed reflections. 3: C 25H 33CoN 2Sn, a 9.735(2) Å, b 19.917(4) Å, c 12.429(1) Å, β 90.36(1)°, space group P2 1/ a (No. 14), Z = 4, monoclinic; R = 0.046 for 4171 observed reflections. The geometry about tin in 1 is distorted ψ-trigonal bipyramidal, and that in 3 is distorted trigonal bipyramidal. Both of the C 6H 4CH 2NMe 2 ligands in 1 and 3 act as chelates by bonding of their nitrogen atom to tin.