X-ray characterization of HnacnacR and the first vanadium β-diiminate dimer (R = mesityl)
Titel:
X-ray characterization of HnacnacR and the first vanadium β-diiminate dimer (R = mesityl)
Auteur:
Weberski, Michael P. McLauchlan, Craig C.
Verschenen in:
Journal of coordination chemistry
Paginering:
Jaargang 61 (2008) nr. 15 pagina's 2371-2379
Jaar:
2008
Inhoud:
The synthesis, characterization, and X-ray crystal structure of HnacnacR (R = mesityl) 1 as well as the structure of the first vanadium β-diiminate dimer, di-μ-hydroxo-di(nacnacR)divanadyl(IV) (R = mesityl) 2 are reported. The reported β-diimine, 1, is prepared through a condensation reaction between 2,4,6-trimethylaniline and 2,4-pentanedione. Compound 1 crystallizes in the [image omitted] space group with Z' = 8; 2 also crystallizes in [image omitted] with Z' = 1. The vanadium(IV) in 2 has the expected distorted square pyramidal geometry. Although the hydroxide hydrogen atoms can be found in the electron difference map, the existence of the bridging hydroxide in 2 was further confirmed through bond distance comparisons and bond valence sum analysis. Compound 1 was characterized by NMR, IR, and X-ray crystallography. (HnacnacR (R = mesityl) = 4-(2,4,6-trimethylphenylimino)-2-(2,4,6-trimethylphenylamino)pent-2-ene; mesityl = 2,4,6-trimethylphenyl).
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