Cationic Tungsten Imido Alkylidene N-Heterocyclic Carbene Complexes That Contain Bulky Ligands
作者:Roman Schowner、Janis V. Musso、Wolfgang Frey、Michael R. Buchmeiser
DOI:10.1021/acs.organomet.1c00373
日期:2021.9.27
Neutral and cationic tungsten imido alkylidene complexes of the general formulas W(NtBu)(CHR1)(OR2)Cl(NHC), W(N-2,6-bis(2,4,6-tri-iPr-C6H4)phenyl)(CHR1)Cl2(NHC), [W(NtBu)(CHR1)(OR2)(NHC)][B(ArF)4] and [W(N-2,6-bis(2,4,6-tri-iPr-C6H4)phenyl)(CHR1)Cl(NHC)][B(ArF)4] (R1 = CMe3, CMe2Ph; R2 = sterically demanding alkoxide; B(ArF)4 = tetrakis(3,5-(CF3)2-C6H3)borate; NHC = N-heterocyclic carbene) were prepared
通式 W( Nt Bu)(CHR 1 )(OR 2 )Cl(NHC), W( N -2,6-bis(2,4,6- tri - i Pr- C 6 H 4 )苯基)(CHR 1 )Cl 2 (NHC)、[W( Nt Bu)(CHR 1 )(OR 2 )(NHC)][B(Ar F ) 4 ]和[W( N -2) ,6-双(2,4,6-三-i Pr-C 6 H 4 )苯基)(CHR 1 )Cl(NHC)][B(Ar F ) 4 ] (R 1 = CMe3、CMe 2 Ph;R 2 = 空间要求高的醇盐;B(Ar F ) 4 = 四(3,5-(CF 3 ) 2 -C 6 H 3 )硼酸盐;NHC = N-杂环卡宾)。两种电子不同的 NHC,即 1,3-二甲基咪唑-2-亚基 (IMe) 和 1,3-二甲基-4,5-二氯咪唑-2-亚基 (IMeCl),以及多种三酚盐和手性双酚盐受雇。在 1-十二烯的 HM