Synthesis and structure of Di-n-propylammonium ethoxybis(di-n-propylmonothiocarbamato)dioxouranate-(VI), a mixed-chelate alkoxide of uranium

Atomic parameters, hydrogen positional parameters, distances, and angles are tabulated. An ORTEP view shows the nonhydrogen atoms and the numbering scheme used for the atoms in the tables. The uranium atom is heptacoordinate and is at the center of a pentagonal bipyramid consisting of two sulfur atoms and five oxygen atoms. The overall molecular structure is compared so that of another dioxouranate complex which has ethyl groups in place of n-propyl groups. In each compound two formula units form a hydrogen-bonded dimer about a crystallographic center of symmetry. These dimers pack in the two crystal lattices with different symmetry, yet corresponding bond distances and angles are in close agreement for the two structure. This consistency indicates that the observed structure is characteristic of the complex and not one which is dominated by moleular packing effects or subject to excessive error. However, the alkyl groups are poorly defined with some large thermal parameters and some bond lengths which are in error. 3 tables, 1 figure