Bis(but-2-enoato-κO)tri-phenyl-bis-muth(V).

In the title mol-ecule, [Bi(C6H5)3(C4H5O2)2], the Bi(V) atom is in a distorted trigonal-bipyramidal environment with carboxyl-ate O atoms in axial positions and phenyl C atoms in the equatorial plane. The Bi-O bond lengths are 2.283 (3) and 2.309 (2) Å, but as a result of additional long Bi⋯O inter-actions [2.787 (3) and 2.734 (3) Å], one of the C-Bi-C angles is 148.62 (13)°. In the crystal, weak C-H⋯O hydrogen bonds connect pairs of mol-ecules into inversion dimers. These dimers are further connected by weak C-H⋯π inter-actions into chains along [100] .

Bis[(E)-3-(4-meth-oxy-phen-yl)prop-2-enoato]triphenyl-anti-mony(V) benzene monosolvate.

The asymmetric unit of the title compound, [Sb(C6H5)3(C10H9O3)2]·C6H6, contains one organometallic mol-ecule and one benzene mol-ecule that is disordered over two sets of sites with an occupancy ratio of 0.556 (15):0.444 (15). The Sb(V) atom is in a distorted trigonal-bipyramidal environment with the carboxyl-ate O atoms in axial positions and phenyl C atoms in the equatorial plane. As a result of additional Sb⋯O inter-actions, one of the C-Sb-C angles is widened to 140.19 (6)°.