Coordination of Nickel(II) by 3‐(2‐(Diphenylphosphanyl)phenyl)‐1<i>H</i>‐pyrazole

We report the solution and structural chemistry of nickel(ii) complexes of the phosphine-oxime Ph2PC6H4-2-CH[double bond, length as m-dash]NOH (PCH[double bond, length as m-dash]NOH). PCH[double bond, length as m-dash]NOH invariably binds in a bidentate manner as illustrated by cis-Ni(PCH[double bond, length as m-dash]NOH)2Cl2 and cis-[Ni(PCH[double bond, length as m-dash]NOH)2]2+ (as its BF4- salt). Treatment of PCH[double bond, length as m-dash]NOH with Ni(OAc)2(H2O)4 gave charge-neutral trans-[Ni(PCH[double bond, length as m-dash]NO)2]0. Treatment of trans-[Ni(PCH[double bond, length as m-dash]NO)2]0 with BF3 gave [Ni(PCH[double bond, length as m-dash]NO)2BF2]BF4. The cation features a planar NiP2N2 center wherein the pair of oximate groups are linked by the difluoroboryl center. The 1 : 1 complexes of the oxime and the oximate are illustrated by [Ni(PCH[double bond, length as m-dash]NOH)Cl2]2 and [Ni(C6F5)(PCH[double bond, length as m-dash]NO)]2, which feature five- and four-coordinate Ni(ii) centers, respectively. All complexes in this series hydrolyze to give the trinickel oxo-phosphine-oximate complex [Ni3(PCH[double bond, length as m-dash]NO)3O]+. One feature of the PCH[double bond, length as m-dash]NOH ligand is its wide bite angle combined with its protic OH center. These aspects are manifested in the structures of Ni(PCH[double bond, length as m-dash]NOH)2Cl2 and [Ni(PCH[double bond, length as m-dash]NOH)Cl2]2, which show intramolecular hydrogen bonding to terminal chloride ligands.

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Ni(ii) complexes of the phosphine-oxime Ph₂PC₆H₄-2-CHNOH

Basu

Woods

Rauchfuss

2018

Dalton Trans.

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Coordination of Nickel(II) by 3‐(2‐(Diphenylphosphanyl)phenyl)‐1H‐pyrazole

Abstract: Abstract. Starting from easily accessible 3-[2-(diphenylphosphanyl)-phenyl]-1H-pyrazole a series of four-and five-coordinate diamagnetic nickel(II) complexes were synthesized and structurally characterized. The resulting complexes show dynamic NMR spectra reflecting a high

Cited by 1 publication

References 54 publications

Ni(ii) complexes of the phosphine-oxime Ph₂PC₆H₄-2-CHNOH

Ni(ii) complexes of the phosphine-oxime Ph₂PC₆H₄-2-CHNOH

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Coordination of Nickel(II) by 3‐(2‐(Diphenylphosphanyl)phenyl)‐1H‐pyrazole

Abstract: Abstract. Starting from easily accessible 3-[2-(diphenylphosphanyl)-phenyl]-1H-pyrazole a series of four-and five-coordinate diamagnetic nickel(II) complexes were synthesized and structurally characterized. The resulting complexes show dynamic NMR spectra reflecting a high

Cited by 1 publication

References 54 publications

Ni(ii) complexes of the phosphine-oxime Ph2PC6H4-2-CHNOH

Ni(ii) complexes of the phosphine-oxime Ph2PC6H4-2-CHNOH

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Product

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Ni(ii) complexes of the phosphine-oxime Ph₂PC₆H₄-2-CHNOH

Ni(ii) complexes of the phosphine-oxime Ph₂PC₆H₄-2-CHNOH