Synthesis and structure of bis(2-methylquinoline-8-selenolato)platinum

Bis(2-methylquinoline-8-selenolato)platinum was synthesized and studied by X-ray diffraction structural analysis. The diffraction results were compared with the data for bis(quinoline-8-selenolato)platinum, bis(2-methylquinoline-8-thiolato)platinum, and bis(quinoline-8-thiolato)-platinum. The effect of the 2-methyl group on the structure of the complex and its coordination sphere (Pt + 2Se + 2N) was discussed.     

Hexafluorosilicates of bis(carboxypyridinium) and bis(2-carboxyquinolinium)

The preparation and characterization of three isomeric carboxypyridinium and carboxyquinolinium hexafluorosilicate salts is described. The salts of the general formulas (LH)₂[SiF₆] (I-III, L = 2-carboxypyridine, 3-carboxypyridine, 4-carboxypyridine) and (LH)₂[SiF₆]·2H₂O (IV, L = 2-carboxyquinoline) were prepared from the protonation reaction of the corresponding pyridine carbonic acid by the fluorosilicic acid. The compounds were characterized by IR, mass-spectrometry, thermogravimetric analysis, solubility data, and in the case of III by X-ray crystallography. The relationship between the salts solubility and the H-bonding system was analysed.     

Chelating properties of bis(8-hydroxy-2-methyl-5-quinolyl)methane

A new chelating reagent, bis(8-hydroxy-2-methyl-5-quinolyl) methane, has been prepared and characterized. It does not react with aluminum but does chelate with many other metals. Analytical data did not permit a decision on the possibility that some of these chelates arc polymeric.     

Synthesis and structure of di(2-phenyl-8-quinolyl) diselenide and zinc bis[(2-phenyl-8-quinolyl)selenolate]

Di(2-phenyl-8-quinolyl) diselenide [2-(C₆H₅)C₉H₅NSe]₂ and zinc bis[(2-phenyl-9-quinolyl)selenolate], Zn [2-(C₆H₅)C₉H₅NSe]₂, have been synthesized. The molecular and crystal structure of the compounds were determined by X-ray structural analysis. The structures of the 2-phenyl-8-quinolylselenol ligand in the molecules of di(2-phenyl-8-quinolyl) diselenide and in the intracomplex compound of zinc are compared. The effect of the phenyl group in position 2 of the quinoline nucleus on the formation of the molecules and their packing in the crystal structure is discussed.     

Synthesis of the bis(2′-chloroethyl) amide of β-(8-guanyl)propionic acid

The synthesis of -(8-guanyl)propionic acid and its chloride, methyl ester, bis(2-hydroxyethyl)amide, and bis(2-chloroethyl)amide has been effected. The latter readily rearranges under certain conditions into 2-chloroethylaminoethyl -(8-guanyl)propionate.     

Darstellung,spektroskopische Charakterisierung und Kristallstrukturen von Quecksilber(II)‐bis(tetracyanoborat) Hg[B(CN)4]2 und Diquecksilber(I)‐bis(tetracyanoborat) Hg2[B(CN)4]2

Preparation, Spectroscopic Characterization and Crystal Structures of Mercury(II)‐bis(tetracyanoborate) Hg[B(CN)₄]₂ and Dimercury(I)‐bis(tetracyanoborate) Hg₂[B(CN)₄]₂ Hg[B(CN)₄]₂ ( 1 ) is synthesised by the reaction between Hg(NO₃)₂ and K[B(CN)₄]₂. In a comproportionation reaction of 1 with elemental mercury the corresponding mercury(I) salt Hg₂[B(CN)₄]₂ ( 2 ) is obtained. The compounds were characterised by vibrational‐ and NMR‐spectroscopy, and their crystal structures were determined. Hg[B(CN)₄]₂ crystallizes in the trigonal system in the space group P3¯m1 with a = 781.75(3) pm, c = 601.68(2) pm, V = 318.44(2)ų, and one formula unit per unit cell. For Hg₂[B(CN)₄]₂ an orthorhombic unit cell with a = 568.9(1) pm, b = 3280.9(7) pm, c = 601.68(2) pm, V = 1389.6(5)Å, and Z = 4 is observed.     

A new cyclic borazine species B(8)(NH)(4)(NMe(2))(8) containing a twelve-membered B(8)N(4) ring

The reaction between B(2)(NMe(2))(4) and two equivalents of [NH(4)][PF(6)] in thf at room temperature affords the new cyclic borazine B(8)(NH)(4)(NMe(2))(8) containing a non-planar twelve-membered ring with alternating B(2)(NMe(2))(2) and NH units.     

Co-ordination polymers of bis(8-hydroxy-5-quinolylmethylene) sulphide (BHQS)

Co-ordination polymers of bis(8-hydroxy-5-quinolylmethylene)sulphide have been prepared with Zn²⁺, Cu²⁺, Ni²⁺, Co²⁺ and Mn²⁺ ions and characterized by elemental analyses, by i.r. and diffuse reflectance spectral studies and by magnetic moment. The metal contents in all polymers are found to be consistent with 1:1 (metal:ligand) stoichiometry. The thermal behaviour of each of the co-ordination polymer has been studied by TGA in air up to 700°C.