Nickel nitrosyl complexes in a sulfur-rich environment: The first poly(mercaptoimidazolyl)borate derivatives |
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Authors: | L Summer Maffett Kelly L Gunter Kevin A Kreisel Glenn PA Yap Daniel Rabinovich |
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Institution: | 1. Department of Chemistry, The University of North Carolina at Charlotte, 9201 University City Boulevard, Charlotte, NC 28223, USA;2. Department of Chemistry and Biochemistry, The University of Delaware, Newark, DE 19716, USA |
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Abstract: | The diamagnetic nickel mononitrosyl complexes (TmR)Ni(NO) (R = But, p-Tol) and (BmR)Ni(PPh3)(NO) (R = Me, But) have been readily prepared from Ni(PPh3)2(NO)Br and the appropriate Na(TmR) or Na(BmR) reagents, respectively. These species constitute the first nickel nitrosyl complexes supported by these ligand systems. An X-ray diffraction study of (Tmp-Tol)Ni(NO) confirmed its pseudo-tetrahedral geometry and the presence of a nearly linear nitrosyl ligand. In contrast, (BmMe)Ni(PPh3)(NO) can be best described as having a trigonal pyramidal geometry, a spatial arrangement unprecedented in nickel nitrosyl chemistry, which is facilitated by the disposition of the BmMe ligand and the presence of a weak intramolecular Ni?H–B interaction opposite to the apical triphenylphosphine ligand. |
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Keywords: | Nickel Bis(mercaptoimidazolyl)borate complexes Tris(mercaptoimidazolyl)borate complexes Nitrosyl Nitric oxide Sulfur-donor ligands |
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