Yttrium Hydride Complex Bearing CpPN/Amidinate Heteroleptic Ligands: Synthesis, Structure, and Reactivity
writer：Zhongbao Jian；Noa K. Hangaly；Weifeng Rong；Zehuai Mou； Dongtao Liu； Shihui Li； Alexander A. Trifon
keywords：azobenzene; p-tolyacetylene ; yttrium; dimethylaminopyridyl
source：期刊
specific source：http://pubs.acs.org/doi/pdf/10.1021/om3003703
Issue time：2012年
The reaction of the yttrium dialkyls (C5H4–PPh2═N–C6H3iPr2)Y(CH2SiMe3)2(thf)
(1) with an excess of N,N′-diisopropylcarbodiimide
gave the yttrium monoalkyl complex (C5H4–PPh2═N–C6H3iPr2)Y(CH2SiMe3)[iPrN═C(CH2SiMe3)–NiPr]
(2). 2 subsequently reacted with 1 equiv of PhSiH3 to
generate the CpPN/amidinate heteroleptic yttrium hydride {(C5H4–PPh2═N–C6H3iPr2)Y[iPrN═C(CH2SiMe3)–NiPr](μ-H)}2 (3).
Hydride 3 showed good reactivity toward various substrates
containing unsaturated C–C, C–N, and N–N bonds, such as azobenzene, p-tolyacetylene,
1,4-bis(trimethylsilyl)-1,3-butanediyne, N,N′-diisopropylcarbodiimide,
and 4-dimethylaminopyridine, affording the yttrium hydrazide complex 4 with
a rare η2-Cp bonding mode, yttrium terminal alkynyl complex 5,
yttrium η3-propargyl complex 6, yttrium amidinate
complex 7, and yttrium 2-hydro-4-dimethylaminopyridyl product 8,
respectively.
