Synthesis and crystal structure of [Y(C 5Me 4SiMe 3){μ-O(CH 2) 3CH 3}{N(SiHMe 2) 2}] 2

Abstract

A dimeric yttrium complex [Y(C 5Me 4SiMe 3){μ-O(CH 2) 3CH 3}{N(SiHMe 2) 2}] 2 ( 1) was isolated as one of the byproducts from the reaction of Y{N(SiHMe 2) 3} 3(THF) 2 with C 5Me 4HSiMe 3 in 1:1.1 molar ratio in toluene at 100 °C for 2 d. Complex 1 was characterized by elemental analysis, NMR spectroscopy, FT-IR spectroscopy, and X-ray single crystal structure analysis. X-ray diffractions revealed that complex 1 was a symmetric dimer, and the center metal Y 3+ was six-coordinated by one nitrogen atom from the amide group, two bridging oxygen atoms from the O(CH 2) 3CH 3 groups, and one cyclopentadienyl ring in η 5-fashion to adopt a distorted tetrahedron geometry. The formation of complex 1 was postulated to be a result from C-O bond cleavage reaction of THF.