Influence of Ligand Substitution Pattern on Structure in Cobalt(II) Complexes of Bulky  N , N′ ‐Diarylformamidinate  N ‐Oxides | Zendy

Cibian Mihaela | Zendy; LangisBarsetti Sophie | Zendy; De Mendonça Fernanda Gomes | Zendy; Touaibia Sammy | Zendy; Derossi Sofia | Zendy; Spasyuk Denis | Zendy; Hanan Garry S. | Zendy

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Influence of Ligand Substitution Pattern on Structure in Cobalt(II) Complexes of Bulky N , N′ ‐Diarylformamidinate N ‐Oxides

Author(s) -

Cibian Mihaela,

LangisBarsetti Sophie,

De Mendonça Fernanda Gomes,

Touaibia Sammy,

Derossi Sofia,

Spasyuk Denis,

Hanan Garry S.

Publication year - 2015

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.201402895

Subject(s) - chemistry , isomerization , cobalt , steric effects , ligand (biochemistry) , crystallography , substitution (logic) , oxide , chelation , stereochemistry , tetrahedron , inorganic chemistry , organic chemistry , catalysis , biochemistry , receptor , computer science , programming language

Cobalt(II) complexes of bulky N , N′ ‐diarylformamidinate N ‐oxide ligands were synthesized and structurally characterized. The cobalt(II) bis(chelates) are square‐planar (low spin) in the solid state, according to XRD and magnetic measurements ( μ eff = 1.8 to 2.1 μ B ), but show square‐planar (low spin) to tetrahedral (high spin: μ eff = 3.5 to 4.7 μ B ) isomerization in solutions of noncoordinating solvents, as demonstrated by different spectroscopic techniques. The isomerization equilibrium is highly sensitive to the substitution pattern on the ligand due to a combination of steric and electronic influences.

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