SYNTHESIS OF SOME DINUCLEAR NIOBIUM CHLORO ALKOXY CARBOXYLATES [NB2CL4(OET)(4)(O(2)CR)(2)], AND THE X-RAY CRYSTAL AND MOLECULAR-STRUCTURE OF THE COMPOUND WITH R=PH
UNSPECIFIED (1994) SYNTHESIS OF SOME DINUCLEAR NIOBIUM CHLORO ALKOXY CARBOXYLATES [NB2CL4(OET)(4)(O(2)CR)(2)], AND THE X-RAY CRYSTAL AND MOLECULAR-STRUCTURE OF THE COMPOUND WITH R=PH. Inorganica Chimica Acta, 227 (1). pp. 99-104. ISSN 0020-1693Full text not available from this repository.
The reaction of NbCl3 with aromatic organic acids and ethanol has been found to yield the first examples of trifunctional chloro alkoxy carboxylate niobium(V) complexes [Nb2Cl4(OEt)(4)(O(2)CR)(2)] (R=Ph (1), p-FC6H4, p-ClC6H4, p-IC6H4, p-MeC(6)H(4)). Attempts to obtain related compounds by the use of different molar ratios of reactants under a variety of conditions have proved unsuccessful. The structure of 1 has been determined by single crystal X-ray crystallography, the data being as follows: triclinic space group P $($) over bar$$ 1 with unit cell dimensions a = 10.689(3), b = 9.548(2), c = 9.552(2) Angstrom, V=753.90 Angstrom(3), Z=2. The structure was refined to R = 0.0623 (R' = 0.0677) with 1347 reflections having I greater than or equal to 3 sigma(I). The dinuclear unit contains unique unsymmetrical bridging carboxylate groups, as well as terminal chlorine atoms and ethoxy groups. The crystal contains chains of dimers which exhibit face-to-face pi-pi interactions between the aromatic rings of the benzoate ligands.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||Inorganica Chimica Acta|
|Publisher:||ELSEVIER SCIENCE SA LAUSANNE|
|Date:||1 December 1994|
|Number of Pages:||6|
|Page Range:||pp. 99-104|
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