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Type M (type + m)
Selected AbstractsChemInform Abstract: Ca{Li2[MnIN]2}: Link Between Crystal Chemistry of Lithium Nitrido Compounds and Boride Carbides of the Type M[B2C2].CHEMINFORM, Issue 6 2001Jens Klatyk Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] A family of thioxanthato ruthenium and osmium arylsISRAEL JOURNAL OF CHEMISTRY, Issue 3 2001Swarup Chattopadhyay The title complexes of type M(RL2)(PPh3)2(CO)(S2CSEt) (2a: M = Ru; 2b: M = Os) have been synthesized in excellent yields by reacting M(RL1)(PPh3)2(CO)X (1a: M = Ru, × = Cl; 1b: M = Os, × = Br) with potassium ethyl thioxanthate and have been characterized with the help of spectral and electrochemical data. The RL2 ligand in 2 is the imine-phenol tautomer of N-C6H4R(p)-4-methylsalicylaldimine (R = Me, MeO, Cl) coordinated at the carbanionic-C2 atom only while RL1 in 1 is the iminium-phenolato tautomer chelated via carbanionic-C2 and phenolato-O atoms. The synthetic reaction is thus attended with tautomerization of the Schiff base ligand. It is also associated with a rotation of the ligand by ,180° around the M,C bond in order to exclude steric repulsion. These features have been revealed by structure determination of 2a (R = Me). The metallated aldimine ring is found to be highly noncoplanar (dihedral angle ,40°) with the thioxanthate chelate ring due to steric repulsion originating from the relatively large size of the sulfur atom. This phenomenon, which is absent in both the precursor 1 (R = Me) and in the carboxylate analogue Ru(MeL2)(PPh3)2(CO)(O2CMe), 7, has distinctive effects on bond parameters of 2a (R = Me). Thus the two Ru,P bonds in 2a (R = Me) differ in length by as much as 0.06 Å. The thioxanthate 2 is thermodynamically more stable than the precursor 1 as well as the carboxylate 7. Accordingly, both of these are irreversibly transformed to 2a (R = Me) upon treatment with thioxanthate. [source] Inverse bilayer structure of mononuclear CoII and NiII complexes of the type M(H2O)3(SO4)(4-CNpy)2ACTA CRYSTALLOGRAPHICA SECTION B, Issue 4 2009Birinchi K. Das Two new metal compounds of the formula [M(H2O)3(SO4)(4-CNpy)2]·H2O [M = Ni (1) and Co (2), 4-CNpy = 4-cyanopyridine] have been prepared and studied by X-ray diffraction. In both of these compounds the 4-CNpy ligands are coordinated via pyridyl-N atoms to the metal ions in a cis fashion. The neutral complexes along with the uncoordinated H2O molecules are glued together preferentially into inverse bilayers by non-covalent interactions, including unique interlayer ,,, interactions between antiparallel nitrile groups. Hartree,Fock and density-functional theory (DFT) calculations indicate that the ,,, interactions are energetically significant. The unit-cell similarity index (,) of 0.0046 for the compounds suggests their isostructurality, which is also supported by their X-ray powder diffraction patterns that can be almost superimposed. [source] Deposition of Ni and Pd Sulfide Thin Films via Aerosol-Assisted CVD,CHEMICAL VAPOR DEPOSITION, Issue 10 2006P. O'Brien Abstract Thin films of nickel sulfide (NiS1.03, NiS2,,-Ni7S6, or mixtures thereof) and palladium sulfide (PdS, Pd16S7, Pd4S, or mixtures thereof) have been prepared by aerosol-assisted (AA)CVD using dithiocarbamate precursors of the type M(S2CNRR')2 (M,=,Ni, Pd; RR',=,Et2, MeEt, MenBu, or MenHex). The solid-state structure of Ni(S2CNMenBu)2, was determined by X-ray single-crystal diffraction and is characteristic of known nickel dithiocarbamates. Films were grown on glass substrates at temperatures of 400,525,°C and characterized by X-ray diffraction (XRD), energy dispersive analysis of X-rays (EDAX), and scanning electron microscopy (SEM). [source] | ||||||||||