Thermal behaviour of urea nitrate

The thermal decomposition under argon of the boracites M₃B₇O₁₃X (M=divalent metal ion, X=halogen ion or OH^?) has been studied by thermogravimetry (TG) and differential thermal analysis (DTA) for the compositions MgCl, MgOH, CrC1, CrBr, CrI, MnCl, MnBr, MnI, FeCl, FeBr, FeI, CoCl, CoBr, CoI, NiCl, NiBr, NiI, CuCl, CuBr, ZnCl, ZnBr, ZnI, CdCl, CdBr and CdI. The lithium boracites Li₄B ₇O₁₂X, with XCl and Br, have also been studied. The stability of the boracites systematically decreases in the order MCI>MBr>MI. The most stable boracite is CrCl (1% weight loss at 1242°C) and the least stable one studied here is MgOH (1% weight loss at 717°C).     

Spectral and thermogravimetric studies of oxohalobis(4-morpholinyldithiocarbamato)molybdenum(V) complexes

Summary Molybdenum(V) complexes [MoOX(4-Morphdtc)₂] (X=F, Cl, Br or I; 4-Morphdtc = 4-morpholinyldithiocarbamate) have been prepared from molybdenum trioxide using hydrazine hydrohalides as reducing agents. The magnetic moment values atca. 1.65 B.M. and e.p.r. studies indicated that the complexes are mononuclear and that molybdenum is in + 5 oxidation state. The i.r. spectral bands at 1500 and 960 cm^–1 suggest that the dithiocarbamate acts as a univalent bidentate ligand and the bands at 930 cm^–1 confirms the presence of a MoO³⁺ moiety in the complex. The low conductivity values for the complexes inN, N-dimethylformamide indicate that the complexes are non-ionic. The [MoOX(4-Morphdtc)₂] complexes (X=F, Cl or Br) decompose in the first step by the loss of one dithiocarbamate group, whereas in [MoOI(4-Morphdtc)₂] the iodine atom is lost in the first step. The second and third steps lead to the formation of MoS₃ and MoO₃, respectively. A six coordinate structure around Mo with an oxo, halo and two dithiocarbamate groups is proposed.     

Mixed metal complexes of iron-molybdenum with 8-quinolinolate and dithiocarbamates

Summary Iron-molybdenum heterometallic complexes, FeMoO₂R₄-(H₂O) (R=8-quinolinolate, diethyldithiocarbamate, 4-morpholinyl-dithiocarbamate and piperidinyldithiocarbamate), have been prepared from iron(III) molybdate. T.l.c. and x-ray diffraction studies indicate that the complexes are discrete species. The complexes are non-electrolytes in dimethylformamide. Magnetic measurements suggest that the iron and molybdenum are in the III and V oxidation states, respectively, with octahedral geometry around each atom. I.r. spectral studies indicate the presence of MoO³⁺ and FeOMo bridges and the monoionic bidentate nature of the ligands. Electronic spectral and thermal decomposition studies on these complexes are reported.     

A novel thermal transformation of 2,4-di(N-aryl)amino-1,3,5-triazin-6-yl prop-2-ynyl ethers

2,4-Dianilino-1,3,5-triazin-6-yl propargyl ethers have been found to undergo a novel thermal transformation yielding the isomeric 6-methylene imidazo [1,2-a] -1,3,5-triazines.     

Preparation,characterization and cyclic voltammetric behaviour of dimeric sulphidomolybdenum(V) dithiocarbamate complexes

Mo₂S₄(R₂dtc)₂ (R = methyl, ethyl or benzyl; R₂ = pyrrolidinyl, piperidinyl or 4-morpholinyl) have been prepared starting from ammon