Cyclopropenyl and Oxocyclobutenyl Complexes of Molybdenum. Crystal and Molecular Structure of (2,2'-bipyridine)bromodicarbonyl(13-η-1,2,3-triphenylcyclopropenyl)molybdenum(II) and (2,2'-bipyridine)-bromodicarbonyl(24-η-1-oxo-2,3,4-triphenylcyclobutenyl)molybdenum(II)

DOI: 10.1039/DT9810001310

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1310 - 1316 (1981)

Update date:2022-08-04

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Authors:

Drew, Michael G. B.

Brisdon, Brian J.

Day, Alan

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Article abstract of DOI:10.1039/DT9810001310

Reactions of triphenylcyclopropenyl bromide with 2> 2=2,2'-bipyridine (bipy), 1,10-phenanthroline (phen), or 2,2'-dipyridylamine (dpa) yield the two series of products 3-C3Ph3)L₂> and 3-C4Ph3O)L₂>.The cyclopropenyl complexes were also prepared from 3-C3Ph3)(NCMe)2> by reaction with L₂ in MeCN, which yielded crystalline solvates suitable for an X-ray structure determination.Crystals of 3-C4Ph3O)(bipy)>*thf, (1), are monoclinic, a=9.87(1), b=20.36(1), c=16.23(1) Angsrtoem, β=92.2(1) degree, Z=4, space group p2₁/c.Crystals of 3-C3Ph3)(bipy)> *MeCN, (2), are triclinic, a=10.552(8), b=11.607(9), c=13.801(11) Angstroem, α=67.1(1), β=100.4(1), γ=89.5(1) degree, Z=2, space group P<*>. 2832 and 1804 above background reflections were collected on a diffractometer and refined by full-matrix least squares to R 0.072 and 0.082 for (1) and (2) respectively. in both structures the molybdenum atoms are in octahedral environments, with the mutually cis carbonyl groups and bipy ligand occupying an equatorial plane.In trans positions are a bromine atoms and in (1) a η³-oxocyclobutenyl group and in (2) a η³-cyclopropenyl group.