metal-organic compounds
Open access
The asymmetric unit of the title compound, [Fe(C5H5)(C7H8N3S)], consists of two crystallographically independent molecules, A and B. The cyclopentadienyl (Cp) rings in both molecules adopt an eclipsed conformation and are parallel to each other, forming dihedral angles of 2.5 (3) and 1.1 (3)°, respectively. The mean plane of the semicarbazone group is coplanar with the attached Cp ring in molecule A, whereas it is twisted away in molecule B. In the crystal structure, intermolecular N—HS hydrogen bonds link the molecules into two-dimensional planes parallel to the ab plane. The structure is further consolidated by C—Hπ interactions.
metal-organic compounds
Open access
The asymmetric unit of the title polymeric complex, {[Sn2=(C6H5)6(C3H2O4)(H2O)]·C3H6O}n, comprises of two Sn cations, one malonate anion and a non-coordinating acetone solvent molecule. Both crystallographically independent Sn cations are five-coordinated by two O and three C atoms in a distorted trigonal-bipyrimidal geometry. One of the Sn cations is bridged by the malonate units, affording polymeric chains which run along [001]. Weak intramolecular C—Hπ interactions stabilize the molecular structure. In the crystal structure, adjacent chains are interconnected by intermolecular O—HO and C—HO hydrogen bonds into a three-dimensional supramolecular structure. A weak intermolecular C—Hπ interaction is also observed.
metal-organic compounds
Open access
The asymmetric unit of title compound, [Fe(C5H5)(C9H12N3S)], contains two crystallographically independent molecules, A and B. The two cyclopentadienyl (Cp) rings are parallel to each other in both molecules, forming dihedral angles of 2.3 (3) and 1.0 (3)°, respectively, and adopt an eclipsed conformation. The mean plane of the semicarbazone group is twisted slightly away from the attached Cp ring in both molecules, the dihedral angles between the mean plane and the Cp ring being 15.3 (2) and 10.8 (2)°. The ethyl group in molecule A is coplanar with the mean plane of the semicarbazone group [C—N—C—C torsion angle = −175.2 (4)°], whereas it is nearly perpendicular in molecule B [C—N—C—C torsion angle = 84.8 (6)°]. In the crystal structure, intermolecular N—HS hydrogen bonds link the molecules into dimers. These dimers are further linked into chains via intermolecular C—HS hydrogen bonds. The crystal studied was a non-merohedral twin with a refined ratio of the twin components of 0.265 (2):0.735 (2).