title: The nitrate dihydrate of an aquadicopper(II) complex cation with guanidinoacetic acid and a novel trianionic disubstituted guanidine as ligands at 120 K.
abstract: The structure of the title compound, aqua[mu-(N(1)-carboxylatomethylguanidino)oxidoacetato](mu-guanidinoacetic acid)dicopper(II) nitrate dihydrate, [Cu(2)(C(5)H(6)N(3)O(5))(C(3)H(7)N(3)O(2))(H(2)O)]NO(3) x 2H(2)O, contains two enantiomers of the dicopper(II) complex cation that comprise water, neutral zwitterionic guanidinoacetic acid and the trianion of (N(1)-carboxymethylguanidino)hydroxyacetic acid as ligands. Extensive hydrogen bonding creates three-dimensional connectivity but is largely confined to layers that each contain both cation enantiomers. These layers are related to one another by crystallographic symmetry and are therefore identical in composition and connectivity.
authors.affiliation: Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, Rua Marquês de São Vicente 225, Gávea, 22453-900 Rio de Janeiro, RJ, Brazil.
authors.forename: Judith
authors.initials: J
authors.lastname: Felcman
authors.forename: R Alan
authors.initials: RA
authors.lastname: Howie
authors.forename: Jussara
authors.initials: J
authors.lastname: Lopes de Miranda
authors.forename: Janet M S
authors.initials: JM
authors.lastname: Skakle
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell