Structure-constraint induced increase in Lewis acidity of tris(ortho-carboranyl)borane and selective complexation with Bestmann ylides

被引：2

作者：

Xiang, Libo ^{[1
,2
]}

Wang, Junyi ^{[3
]}

Matler, Alexander ^{[1
,2
]}

Ye, Qing ^{[1
,2
]}

机构：

[1] Julius Maximilians Univ Wurzburg Hubland, Inst Inorgan Chem, D-97074 Wurzburg, Germany

[2] Univ Wurzburg Hubland, Inst Sustainable Chem & Catalysis Boron Julius Max, D-97074 Wurzburg, Germany

[3] Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China

来源：

CHEMICAL SCIENCE | 2024年 / 15卷 / 43期

关键词：

DIVALENT CARBON(0) CHEMISTRY; OLEFIN POLYMERIZATION; MAIN-GROUP; ANION; ACTIVATION; BOROLES; TRIARYLBORANES; ASTERISK; BINDING;

D O I：

10.1039/d4sc06144f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The Lewis acidity of tris(ortho-carboranyl)borane has been slightly increased by mimicking the structural evolution from triarylborane to 9-aryl-9-borafluorene. The o-carborane-based analogue (C2B10H10)(2)B(C2B10H11), obtained via salt elimination between LiC2B10H11 and (C2B10H10)(2)BBr, has been fully characterized. Gutmann-Beckett and computational fluoride/hydride ion affinity (FIA/HIA) studies have confirmed the increase in Lewis acidity, which is attributable to structural constraint imposed by the CC-coupling between two carboranyl groups. Selective complexation of (C2B10H10)(2)B(C2B10H11) with Bestmann ylides R3PCCO (R = Ph, Cy) has been achieved, enabling further conversion into the zwitterionic phospholium salt through NHC-catalyzed proton transfer.

引用

页码：17944 / 17949

页数：6