title: catena-Poly[tris(ethylenediamine-kappa2N,N')nickel(II) [[trithiocyanato-kappa3N-sodium(I)]-mu-aqua-kappa2O:O]].
abstract: The title complex, ([Ni(C(2)H(8)N(2))(3)][Na(NCS)(3)(H(2)O)])(n), consists of discrete [Ni(en)(3)](2+) dications (en is ethylenediamine) and polymeric [(H(2)O)(0.5)Na(NCS)(3)(H(2)O)(0.5)](n)(2n-) anions. The compound crystallizes in space group P-3c1. The Ni(II) atom lies on a threefold axis and has a distorted octahedral coordination geometry. The Na(+) cation also lies on a site with imposed crystallographic threefold symmetry and is coordinated by the thiocyanate N atoms (the thiocyanates are in general positions), by one water molecule with crystallographically imposed 32 symmetry and by a second water molecule with crystallographically imposed -3 symmetry. The unique Na atom thus has trigonal-bipyramidal coordination. The O atoms of the water molecules bridge the Na(+) cations to form one-dimensional polymeric chains in the crystal structure. The [Ni(en)(3)](2+) dications are distributed around and between the chains and are linked to them via N-H.S hydrogen bonds.
authors.affiliation: Department of Chemistry, Hangzhou Teachers' College, Hangzhou 310012, People's Republic of China. shenchem@sina.com
authors.forename: Liang
authors.initials: L
authors.lastname: Shen
authors.forename: Zhi Min
authors.initials: ZM
authors.lastname: Jing