title: Bipodal 1,1'-acyl-3,3,3',3'-tetraalkylbis(thiourea) ligands with flexible C3, C4 and C6 spacer groups.
abstract: In the structures of 3,3,3',3'-tetraethyl-1,1'-(propane-1,3-diyldicarbonyl)bis(thiourea), C(15)H(28)N(4)O(2)S(2), (I), 3,3,3',3'-tetraethyl-1,1'-(butane-1,4-diyldicarbonyl)bis(thiourea), C(16)H(30)N(4)O(2)S(2), (II), and 3,3,3',3'-tetrabutyl-1,1'-(hexane-1,6-diyldicarbonyl)bis(thiourea), C(26)H(50)N(4)O(2)S(2), (III), compound (I) displays resonance-assisted hydrogen bonding, (II) exhibits an inversion centre, and both (II) and (III) are characterized by intermolecular hydrogen bonds between the carbonyl O atoms and thioamide H atoms, leading to chains of hydrogen-bonded molecules throughout the structures. The accurate structural data for these molecules is expected to assist in molecular modelling and other studies currently in progress.
authors.affiliation: Institut für Anorganische Chemie, Fakultät für Chemie und Mineralogie, Johannisallee 29, 04103 Leipzig, Germany.
authors.forename: Susanne
authors.initials: S
authors.lastname: Stockmann
authors.forename: Jocelyn
authors.initials: J
authors.lastname: Bruce
authors.forename: Jorn
authors.initials: J
authors.lastname: Miller
authors.forename: Klaus R
authors.initials: KR
authors.lastname: Koch