Diversification of Carbodicarbene Class by Embedding an Anionic Component in its Scaffold

We report the synthesis of the first anionic CDC pincer Pd complexes containing a BF2 moiety within the framework, a charge-frustration zwitterion approach to leverage the electronic feature of carbon(0)/carbone, which is unprecedented. The elucidation of X-ray crystal structures, ligand competition as well as transmetallation experiments suggest that the anionic moiety has enhanced the overall donor strength of the traditional neutral CDC. Importantly, this anionic scaffold exhibits a facile second coordination toward Au(I), Ag(I) and Pd(II) without any external ligand assistance, whereas previously reported neutral pincer CDC complexes do not possess a two-fold donor capacity. The analysis of the bonding situation via theoretical methods shows that the description of the anionic CDC moieties in terms of dative bonding is preferred over the model of delocalized positive charge, as it accounts for the two-fold donor ability of the divalent carbon atom, preserving characteristic feature of a carbone.PMID:37730960 | DOI:10.1002/chem.202302886

Source: Chemistry - September 21, 2023 Category: Chemistry Authors: Cheng-Han Yu Ka-Chun Au-Yeung Ruiqin Liu Chao-Hsien Lee Dandan Jiang Bamlaku Semagne Aweke Chia-Hung Wu Yu-Jou Wang Ting-Hsuan Wang Kien Voon Kong Glenn P A Yap Wen-Ching Chen Gernot Frenking Lili Zhao Tiow-Gan Ong Source Type: research