title: Metal-organic frameworks incorporating Cu3(mu3-OH) clusters.
abstract: Interaction of 4,4-bi(1,2,4-triazole) (btr) with copper(II) chloride (bromide) in aqueous or aqueous alcohol media led to a series of coordination polymers featuring the formation of mu 3-hydroxotricopper(II) clusters and their integration into 3D frameworks. These unprecedented structures originate in the propagation of trigonal hydroxotricopper(II) clusters bridged by tri- or tetradentate organic ligands. Complex [{Cu3(mu3-OH)}{Cu3(mu3-O)}(mu4-btr)3(H2O)4(OH)2Cl6]Cl.0.5H2O adopts a structure of SrSi2 topology, with eight-fold interpenetration of the coordination frameworks. The structure of [{Cu3(mu3-OH)}2(mu3-btr)6(mu4-btr)(mu-X)X4]X5.nH2O (X = Br, n = 6; X = Cl, n = 8) involves 2D coordination layers [{Cu3(mu3-OH)}(mu3-btr)3]n with an exceptional (3,6)-net topology, which are cross-linked by tetradentate btr ligands and bridging chloride (bromide) ions.
authors.affiliation: Inorganic Chemistry Department, Kiev University, Volodimirska Street 64, Kiev, 01033, Ukraine.
authors.forename: Andrey B
authors.initials: AB
authors.lastname: Lysenko
authors.forename: Evgen V
authors.initials: EV
authors.lastname: Govor
authors.forename: Harald
authors.initials: H
authors.lastname: Krautscheid
authors.forename: Konstantin V
authors.initials: KV
authors.lastname: Domasevitch