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Distinct Palladium(II) Carbene Complexes Supported by Six-Membered 1,3-Disubstituted Permidin-2-ylidene, Six-Membered N-Heterocyclic Carbenes
ACS Omega ( IF 3.7 ) Pub Date : 2018-06-19 00:00:00 , DOI: 10.1021/acsomega.8b00437
Sojung Lee 1 , Bulat Gabidullin 1 , Darrin Richeson 1
Affiliation  

The first synthesis, isolation, and characterization of permidin-2-ylidene complexes of Pd(II) is reported with entry resulting from either a direct reaction with isolable six-membered N-heterocyclic carbene or from the enetetramine, arising from dimerization of the carbene. Furthermore, a simplified method to prepare N,N′-disubstituted perimidinium bromide salts, precursors to 1,3-disubstituted perimidin-2-ylidene, was achieved using ammonium bromide as a source of weak acid. Through synthesis and nuclear magnetic resonance spectroscopic analysis of a carbene-phosphinidine adduct, an interrogation of the fundamental π-bonding ability of 1,3-diisopropylperimidin-2-ylidene revealed this interaction to be weak and of a similar order to unsaturated imidazol-2-ylidenes.

中文翻译:

六元1,3-二取代的Permidin-2-亚烷基,六元N-杂环卡宾支持的不同钯(II)碳络合物

据报道,Pd(II)的嘧啶-2-亚烷基配合物的首次合成,分离和表征,是由于与可分离的六元N杂环卡宾直接反应或由卡宾的二聚作用而产生的四烯碳胺引起的。 。此外,使用溴化铵作为弱酸的来源,获得了一种简化的方法,用于制备N,N'-二取代的Permidinium溴化物盐,它们是1,3-二取代的Permidin-2-Yylden的前体。通过对卡宾-膦亚膦加合物的合成和核磁共振波谱分析,对1,3-二异丙基perimidin-2-yylne的基本π键能力的询问表明,这种相互作用较弱,并且与不饱和咪唑-2相似。 -亚基。
更新日期:2018-06-19
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