Syntheses and electrochemistry of imidochromium(V) compounds. Crystal structure of [PPh4][Cr(NBut)Cl4(OH2)] | Zendy

WaHung Leung | Zendy; Man-Ching Wu | Zendy; KwokYin Wong | Zendy; Yu Wang | Zendy

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Syntheses and electrochemistry of imidochromium(V) compounds. Crystal structure of [PPh4][Cr(NBut)Cl4(OH2)]

Author(s) -

WaHung Leung,

Man-Ching Wu,

KwokYin Wong,

Yu Wang

Publication year - 1994

Publication title -

journal of the chemical society. dalton transactions

Language(s) - English

Resource type - Journals

eISSN - 2050-5671

pISSN - 0300-9246

DOI - 10.1039/dt9940001659

Subject(s) - crystal structure , chemistry , octahedron , cyclic voltammetry , crystallography , cationic polymerization , electrochemistry , schiff base , derivative (finance) , molecule , redox , diamine , protonation , electron paramagnetic resonance , stereochemistry , medicinal chemistry , ion , inorganic chemistry , nuclear magnetic resonance , polymer chemistry , physics , organic chemistry , electrode , financial economics , economics

Reactions of [Cr(NBut)Cl3(dme)] (dme = 1,2-dimethoxyethane) or [PPh4][Cr(NBut)Cl4] with Tl(C5H5) and NaL′ {L′ = (η-C5H5)Co[PO(OEt)2]3} gave respective paramagnetic (μeff ca. 1.7 μB) half-sandwich imidochromium(V) compounds [CrL(NBut)Cl2] (L = η-C5H5 1 or L′ 2). The structure of [PPh4][Cr-(NBut)Cl4(OH2)] has been established by X-ray crystallography. The [Cr(NBut)Cl4(OH2)]- anion has an octahedral geometry with Cr-N (imido) 1.619(3) Å. Treatment of [Cr(NBut)(L)Cl] [H2L = N,N′-bis(salicylidene)ethane-1,2-diamine or its 3,5-But2 derivative] with AgBF4 afforded cationic imidochromium(V) Schiff-base compounds [Cr(NBut)L]BF4. Reactions of the imidochromium(V) compounds with PPh3 at reflux or on irradiation with UV light gave Ph3P=NBut and CrIII. Cyclic voltammetry of the imidochromium(V) compounds showed in most cases irreversible oxidation and reduction waves, which are attributed to oxidation and reduction of CrV.Department of Applied Biology and Chemical Technolog

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