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Synthesis, characterization, and crystal structures of organonickel(II) complexes coordinated to novel 1‐bromo‐2,6‐bis{[(λ 5 ‐phosphanylidene)imino]methyl}benzene NCN‐pincer ligands
Author(s) -
Guillet Gary L.,
Pitts Skyler L.,
Sheriff Kirkland W.,
Rucker Don.,
Rogers Aaryn L.
Publication year - 2019
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229619012038
Subject(s) - chemistry , pincer movement , reactivity (psychology) , steric effects , medicinal chemistry , crystal structure , ligand (biochemistry) , oxidative addition , dichloromethane , benzene , stereochemistry , ether , nickel , diethyl ether , pincer ligand , catalysis , crystallography , organic chemistry , solvent , medicine , biochemistry , alternative medicine , receptor , pathology
A novel family of four 1‐bromo‐2,6‐bis{[(λ 5 ‐phosphanylidene)imino]methyl}benzene ligands has been synthesized and characterized. The phosphiniminomethyl substituents are decorated with either three phenyl groups, two phenyl and one cyclohexyl group, one phenyl and two cyclohexyl groups, or three cyclohexyl groups. Each ligand was metallated using zero‐valent nickel through an oxidative addition to form a family of organonickel(II) complexes, namely (2,6‐bis{[(triphenyl‐λ 5 ‐phosphanylidene)imino]methyl}phenyl‐κ 3 N , C 1 , N ′)bromidonickel(II) dichloromethane hemisolvate, [NiBr(C 44 H 37 N 2 P 2 )]·0.5CH 2 Cl 2 , (2,6‐bis{[(cyclohexyldiphenyl‐λ 5 ‐phosphanylidene)imino]methyl}phenyl‐κ 3 N , C 1 , N ′)bromidonickel(II) diethyl ether hemisolvate, [NiBr(C 44 H 49 N 2 P 2 )]·0.5C 4 H 10 O, (2,6‐bis{[(dicyclohexylphenyl‐λ 5 ‐phosphanylidene)imino]methyl}phenyl‐κ 3 N , C 1 , N ′)bromidonickel(II), [NiBr(C 44 H 61 N 2 P 2 )], and (2,6‐bis{[(tricyclohexyl‐λ 5 ‐phosphanylidene)imino]methyl}phenyl‐κ 3 N , C 1 , N ′)bromidonickel(II), [NiBr(C 44 H 73 N 2 P 2 )]. This family of complexes represents a useful opportunity to investigate the impact of incrementally changing the steric characteristics of a complex on its structure and reactivity.