title: Crystal structure of anhydrous poly[bis-(μ2-sarcosinato-κ(3) O,N:O')copper(II)].
abstract: The title compound, [Cu(C3H6NO2)2] n , is a bis-complex of the anion of sarcosine (N-methyl-glycine). The asymmetric unit consists of a copper(II) ion, located on a center of inversion, and one mol-ecule of the uninegative sarcosinate anion. The copper(II) ion exhibits a typical Jahn-Teller distorted [4 + 2] coordination geometry. The four shorter equatorial bonds are to the nitro-gen and carboxyl-ate O atoms of two sarcosinate anions, and the longer axial bonds are to carboxyl-ate O atoms of neighboring complexes. The overall structure is made up from two chains formed by these longer axial Cu-O bonds, one extending parallel to [011] and the other parallel to [0-11]. Each one-dimensional array is connected by the equatorial bridging moieties to the chains on either side, creating an extended two-dimensional framework parallel to (100). There is a single inter-molecular hydrogen-bonding inter-action within the sheets between the amino NH group and an O atom of an adjacent mol-ecule.
authors.affiliation: Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA.
authors.forename: Ray J
authors.initials: RJ
authors.lastname: Butcher
authors.affiliation: Department of Chemistry, The Catholic University of America, 620 Michigan Ave., N.E., Washington, DC 20064, USA.
authors.forename: Greg
authors.initials: G
authors.lastname: Brewer
authors.affiliation: Department of Chemistry, The Catholic University of America, 620 Michigan Ave., N.E., Washington, DC 20064, USA.
authors.forename: Matthew
authors.initials: M
authors.lastname: Zemba
keywords: anhydrous bis­(sarcosinato)copper(II); crystal structure; non-proteinogenic amino acid