Deaggregation of Zinc Dihydride by Lewis Acids Including Carbon Dioxide in the Presence of Nitrogen Donors
作者:Florian Ritter、Louis J. Morris、Karl N. McCabe、Thomas P. Spaniol、Laurent Maron、Jun Okuda
DOI:10.1021/acs.inorgchem.1c02207
日期:2021.10.18
complexes show an exchange with free BPh3 as well as [HBPh3]−. DFT calculations suggest the presence of [HBPh3]− anion with a highly polarized B–H bond that interacts with the Lewis acidic zinc hydride cation [(L2)Zn(H)]+. The hydridotriphenylborates [(Ln)Zn(H)(HBPh3)] underwent CO2 insertion to give (formato)zinc (formoxy)triphenylborate complexes [(Ln)Zn(OCHO)][(OCHO)BPh3] (Ln = TMPDA, PMDTA, Me4TACD)
热敏聚合二氢化锌[ZnH 2 ] n可以方便地通过ZnEt 2与[AlH 3 (NEt 3 )]反应制备。当在螯合 N-供体配体 L n = N , N , N ', N '-四甲基乙二胺(TMEDA), N , N , N ', N '-四甲基-1存在下与 CO 2 (1 bar)反应时, 3-丙二胺 (TMPDA)、N,N,N',N",N'' -五甲基二亚乙基三胺 (PMDTA) 和 1,4,7,10-四甲基-1,4,7,10-四氮杂环十二烷 (Me 4TACD),很容易插入到 Zn-H 键中。根据齿数n,甲酸盐 [(L n )Zn(OCHO) 2 ] 被分离并在结构上进行表征,无论是作为分子 (L n = TMEDA、TMPDA、PMDTA) 还是电荷分离的离子对 [(L n ) Zn(OCHO)][OCHO] (L n = Me 4 TACD)。[ZnH 2 ] n与温和的路易斯酸