Aqua(hexamethylenetetramine-κN)bis(methanol)bis(thiocyanato-κN)nickel(II)

Abstract

The Ni atom in the title complex, [Ni(SCN)2(C6H14N4)(CH4O)2(H2O)], is six‐coordinate in a slightly distorted octahedral environment. The hexamethylenetetramine ligand binds to the Ni atom through only one of its N atoms, trans to the coordinated water molecule. The thiocyanate and methanol ligands are also mutually trans. In the crystal structure, complex molecules are linked by four different kinds of hydrogen bonds (O—H...S, O—H...N, C—H...N and C—H...O) to form a three‐dimensional network structure.

Tetraaquabis(2-oxo-1,2-dihydroquinoline-4-carboxylato-κO4)nickel(II)

“…X-ray diffraction analysis has revealed that hqc exists mainly in the form of its tautomer dhqc, because the proton transfers from hydroxyl O atom to N atom under alkaline condition. Similar to the most mononuclear Ni complexes reported previously (Bai et al, 2007;Liu, 2007;Pang et al, 2007;Wu et al, 2007;Zhang et al, 2007), the Ni II atom in the title compound, lying on an inversion center, is six-coordinated by four water molecules and two O atoms from two dhqc ligands (Table 1)…”

“…For related literature, see: Bai et al (2007); Bu et al (2005); Liu (2007); Pang et al (2007); Wu et al (2007); Xiong et al (2000); Zhang et al (2007).…”

Synthesis, crystal structure and luminescent properties of a thiocyanato-bridged two-dimensional heteronuclear polymeric complex of cadmium(II) and nickel(II)

“…Our current interest is the construction of heterometal thiocyanate complexes containing anionic SCN À ligand and d 10 metal ions Cd(II) and this strategy is anticipated to affect the crystal structure and obtain complexes with a new type of stacking structure and interesting optical properties [11]. As a continuance of our research work in the assemblies and properties of coordination polymers [12], here we report the synthesis, crystal structure and luminescent properties of the new heteronuclear l-1,3-thiocyanatobridged coordination polymer, [Cd(SCN) 2 Ni(en)(NCS) 2 (EtOH)] 2 1.…”

Solution Studies on Co(II), Ni(II), Cu(II), and Zn(II) Complexes of Hexamethylenetetramine in Aqueous and Non-Aqueous Solvents

“…When R = 3, the absorbance decreases and the value of the R ratio indicates the coordination of three ligands on the metal ion (4) to probably give a structure similar to the mononuclear structures described by Bai et al [6] for nickel and by Shang et al [29] for cobalt:…”

“…HMTA can therefore form various metal complexes possessing interesting structural features and applications [1][2][3][4][5]. Hexamethylenetetramine as a ligand can bind either in a monodentate manner to a metal [6,7], acting as bridging ligand linking two, three, or four metals [8][9][10][11], or bind to metal-containing species through the formation of hydrogen bonding [5,[12][13][14][15][16]. The combination of both covalent and hydrogen bonding in certain complexes of hexamethylenetetramine leads to the formation of three-dimensional structures that easily decompose by thermal treatment to give thin films of metal oxides [15,16].…”