Dias H V Rasika, Pramanik Abhijit
Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
Acta Crystallogr E Crystallogr Commun. 2020 Oct 9;76(Pt 11):1741-1747. doi: 10.1107/S2056989020013341. eCollection 2020 Nov 1.
The synthesis, isolation and crystal structures of nickel(II) carbonyl, aceto-nitrile and ammonia complexes supported by a dianionic, pyridine dipyrrolide pincer ligand [pyrrpy], namely, carbonyl[2,2'-(pyridine-2,6-di-yl)bis-(3,5-di--tolyl-pyrrolido-κ)]-nickel(II), [Ni(CHN)(CO)], ammine[2,2'-(pyridine-2,6-di-yl)bis-(3,5-di--tolyl-pyrrolido-κ)]nickel(II), [Ni(CHN)(NH)], and (aceto-nitrile-κ)[2,2'-(pyridine-2,6-di-yl)bis-(3,5-di--tolyl-pyrrolido-κ)]nickel(II), [Ni(CHN)(CHCN)], as well as the free ligand 2,6-bis-(3,5-di--tolyl-pyrrol-2-yl)pyridine, CHN or [pyrrpy]H are reported. The nickel complexes are four-coordinate and adopt a square-planar geometry. The CO stretch of the nickel-bound carbon monoxide ligand of [pyrrpy]Ni(CO) has been observed at 2101 cm. The ammonia and aceto-nitrile complexes, [pyrrpy]Ni(NH) and [pyrrpy]Ni(NCMe) feature all-nitro-gen coordination spheres around nickel consisting of different N-donor ligand types.
报道了由双阴离子吡啶二吡咯钳形配体[吡咯吡啶]（即羰基[2,2'-（吡啶-2,6-二基）双-（3,5-二-甲苯基-吡咯烷基-κ）]镍（II），[Ni(CHN)(CO)]、氨[2,2'-（吡啶-2,6-二基）双-（3,5-二-甲苯基-吡咯烷基-κ）]镍（II），[Ni(CHN)(NH)]和（乙腈-κ）[2,2'-（吡啶-2,6-二基）双-（3,5-二-甲苯基-吡咯烷基-κ）]镍（II），[Ni(CHN)(CHCN)]）支撑的镍（II）羰基、乙腈和氨配合物的合成、分离及晶体结构，以及游离配体2,6-双-（3,5-二-甲苯基-吡咯-2-基）吡啶，CHN或[吡咯吡啶]H。镍配合物为四配位，呈平面正方形几何构型。[吡咯吡啶]Ni(CO)中镍结合的一氧化碳配体的CO伸缩振动在2101 cm处被观测到。氨和乙腈配合物[吡咯吡啶]Ni(NH)和[吡咯吡啶]Ni(NCMe)在镍周围具有由不同N供体配体类型组成的全氮配位球。
