Ancillary Steric Effects on the Activation of SiH Bonds in Arylsilazido Rare-Earth Compounds
作者:Kasuni C. Boteju、Amrit Venkatesh、Yang-Yun Chu、Suchen Wan、Arkady Ellern、Aaron J. Rossini、Aaron D. Sadow
DOI:10.1021/acs.organomet.1c00162
日期:2021.6.14
Three new hydridosilazido ligands, −N(SiHMe2)Aryl (Aryl = Ph, 2,6-C6Me2H3 (dmp), 2,6-C6iPr2H3 (dipp)) and their rare-earth complexes LnN(SiHMe2)Aryl}3(THF)n (Ln = Sc, Y, Lu; Aryl = Ph, n = 2; Aryl = dmp, n = 1; Aryl = dipp, n = 0) were synthesized to study the relationships among ligand steric properties, secondary Ln↼H–Si bonding, and the reactivity of amide and SiH groups. In these compounds, the
三个新的氢化硅氮杂配体,-N(SiHMe 2 )Aryl (Aryl = Ph, 2,6-C 6 Me 2 H 3 (dmp), 2,6-C 6 i Pr 2 H 3 (dipp)) 及其稀有-土络合物 LnN(SiHMe 2 )Aryl} 3 (THF) n (Ln = Sc, Y, Lu; Aryl = Ph, n = 2; Aryl = dmp, n = 1; Aryl = dipp, n= 0) 被合成以研究配体空间性质、二级 Ln↼H-Si 键以及酰胺和 SiH 基团的反应性之间的关系。在这些化合物中,芳基的空间阻碍从苯基系统地增加到 2,6-二甲基苯基到 2,6-二异丙基苯基。配合物的 NMR、IR 和 X 射线衍射研究表征了次级相互作用和与稀土中心协调的其他 THF 配体的数量。具有最小苯基硅叠氮基配体 LnN(SiHMe 2 )Ph} 3 (THF) 2的配合物包含与三个非桥连