Pyrazolylcyclohexanol Complexes of Vanadium − A Temperature‐ and Solvent‐Dependent Monomer−Dimer Equilibrium | Zendy

Glas Holger | Zendy; Köhler Klaus | Zendy; Herdtweck Eberhardt | Zendy; Maas Peter | Zendy; Spiegler Michael | Zendy; Thiel Werner R. | Zendy

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Pyrazolylcyclohexanol Complexes of Vanadium − A Temperature‐ and Solvent‐Dependent Monomer−Dimer Equilibrium

Author(s) -

Glas Holger,

Köhler Klaus,

Herdtweck Eberhardt,

Maas Peter,

Spiegler Michael,

Thiel Werner R.

Publication year - 2001

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 - 10.1002/1099-0682(200108)2001:8<2075::aid-ejic2075>3.0.co;2-0

Subject(s) - chemistry , dimer , vanadium , monomer , electron paramagnetic resonance , solvent , denticity , crystallography , cyclohexanol , ligand (biochemistry) , stereochemistry , inorganic chemistry , organic chemistry , crystal structure , catalysis , nuclear magnetic resonance , polymer , biochemistry , physics , receptor

The reaction of VOCl 3 with tridentate rac ‐ trans ‐[1‐pyrazolyl‐3‐(2‐pyridyl)]cyclohexanol in the presence of K 2 CO 3 generates a mononuclear six‐coordinate V V complex. With the bidentate ligand rac ‐ trans ‐2‐(pyrazol‐1‐yl)cyclohexan‐1‐ol, reduction of V V to V IV takes place to give a dinuclear complex with bridging alkoxo units; this compound is also accessible starting directly from the V IV precursor VOSO 4 and LiCl. Both complexes were characterized spectroscopically and by X‐ray diffraction. The dimeric V IV complex is in equilibrium with its monomeric counterpart; this temperature‐ and solvent‐dependent equilibrium was followed by EPR spectroscopy.

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