Dicopper(II) trihydroxide cyanoureate dihydrate

Abstract

The title compound, poly[[mu-cyanoureato-tri-mu-hydroxido-dicopper(II)] dihydrate], {[Cu(2)(C(2)H(2)N(3)O)(OH)(3)].2H(2)O}(n), is a new layered copper(II) hydroxide salt (LHS) with cyanoureate ions and water molecules in the interlayer space. The three distinct copper(II) ions have distorted octahedral geometry: one Cu (symmetry 1) is coordinated to six hydroxide groups (4OH + 2OH), whilst the other two Cu atoms (symmetries 1 and 1) are coordinated to four hydroxides and two N atoms from nitrile groups of the cyanoureate ions (4OH + 2N). The structure is held together by hydrogen-bonding interactions between the terminal -NH(2) groups and the central cyanamide N atoms of organic anions associated with neighbouring layers.

Syntheses and structures of ammonium transition-metal dialuminium tris(phosphate) dihydrates (NH4)MAl4(PO4)3·2H2O (M = Mn and Ni)

“…The mixed-metal phosphate composed of tetrahedral, bipyramidal and octahedral building units with chemical formula KNiAl 2 (PO 4 ) 3 Á2H 2 O was firstly reported by Meyer & Haushalter (1994). Isotypic structures were found in the alumino-, ferri-and gallophosphates; (NH 4 )CoAl 2 (PO 4 ) 3 Á-2H 2 O (Panz et al 1998), KMnAl 2 (PO 4 ) 3 Á2H 2 O (Kiriukhina et al 2020), CsFe 3 (PO 4 ) 3 Á2H 2 O (Lii & Huang 1995), (NH 4 )Co-Ga 2 (PO 4 ) 3 Á2H 2 O (Chippindale et al 1996), (NH 4 )MnGa 2 -(PO 4 ) 3 Á2H 2 O (Chippindale et al 1998), (NH 4 )NiGa 2 (PO 4 ) 3 Á-2H 2 O (Bieniok et al 2008) and KNiGa 2 (PO 4 ) 3 Á2H 2 O (Chippindale et al 2009).…”

Synthesis of High Surface Area ZnO(0001) Plates as Novel Oxide Supports for Heterogeneous Catalysts

“…This peak broadening also substantially reduced the (0002) peak height. An additional set of peaks was identified as {[Zn 2 (C 2 H 2 N 3 O)(OH) 3 ]Á2H 2 O} n based upon a match to a similar copper compound in the ICSD database (card # 260453, [26]). This phase was found to comprise *20 wt% of the crystalline fraction of the sample by Reitveld analysis, which suggested that the material existed as a bulk contaminant in the powder rather than a monolayer adsorbed on the surface and did not contribute to the layered structure.…”