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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

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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.

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Abstract

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
ISSN: 0020-1693
Official Date: 1 December 1994
Dates:
DateEvent
1 December 1994UNSPECIFIED
Volume: 227
Number: 1
Number of Pages: 6
Page Range: pp. 99-104
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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