Tungsten(0)–carbonyl complexes of naphthylazoimidazoles

Datta, P. K.; Patra, Ashis K.; Sinha, Chittaranjan

doi:10.1016/j.poly.2008.11.041

Cited by 7 publications

(1 citation statement)

References 58 publications

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“…All the complexes show four CO stretching bands in the infra red region 2075-1825 cm -1 due to 2A 1 + B 1 + B 2 modes as expected for C 2v symmetry and in agreement with their cisconfiguration. [22][23][24][25] The frequencies for the complexes of unsymmetrical ligands are assigned as follows. The higher frequency A l and B 1 bands are assigned to transcarbonyl ligands, while the lower frequency A 1 and B 2 bands are assigned to cis-carbonyl ligands.…”

Section: Infrared Spectramentioning

confidence: 99%

Synthesis and Characterization of Group‐6 Metal Carbonyl Complexes of Aroyl Hydrazone Derivatives

Saleem

Sharma

Mahajan

et al. 2011

Journal of Chemistry

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Carbonyl complexes of Chromium, molybdenum and tungsten of composition, [M(CO)4L-L], (where M= Cr, Mo or W and L-L= benzoic acid[1-(Furan-2-yl)methylene]hydrazide (BFMH), benzoic acid[(thiophene-2-yl)methylene]hydrazide (BTMH), benzoic acid[1-(thiophene-2-yl)ethylidene] hydrazide (BTEH), benzoic acid (phenylmethylene)hydrazide (BPMH) and benzoic acid[1-(anisol-3-yl)methylene] hydrazide (BAMH) are reported. These have been prepared by refluxing metal carbonyls and the ligands in 1:1molar ratio. The complexes were characterized by elemental analysis, IR spectra, UV-vis spectra,1H NMR, TGA/DTA, conductivity and magnetic susceptibility measurements. The IR bands suggest that in all the complexes the ligands behave as neutral bidentate chelating type coordinating metal through carbonyl oxygen and azomethine nitrogen. The CO force constants and CO-CO interaction constants for these derivatives have been calculated using Cotton-Kraihanzel secular equations, which indicate poorπ-bonding ability of the coordinated ligands.

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Section: Infrared Spectramentioning

confidence: 99%