Artículos de revistas
Enthalpy Of Metal-ligand Interactions In Some Adducts Znx2·2l (x = Cl, Br; L = Ligand With O Or N As Electron Donor Atom)
Registro en:
Polyhedron. , v. 13, n. 1, p. 27 - 37, 1994.
2775387
10.1016/S0277-5387(00)86634-6
2-s2.0-0003003946
Autor
Lot E.F.
Airoldi C.
Chagas A.P.
Institución
Resumen
The enthalpies of dissociation of ZnY bonds, D(ZnY), in adducts of the type ZnX2·2L (X = Cl, Br; L = ligand with O or N as donor atom) were previously estimated by means of the extrathermodynamic hypothesis. The present paper confirms these previous calculations by means of: (a) using a thermochemical cycle involving the dissolution of solid and gaseous zinc chloride in the ligands, i.e. N,N-dimethylactamide (dma) and pyridine (py). For ZnCl2·2dma and ZnCl2·2py, the values of D(ZnO) found were 147 ± 15 and 156 ± 15 kJ mol-1, respectively. These values are comparable to those obtained previously: 139 ± 15 and 153 ± 15 kJ mol-1, respectively. (b) Using the theory of Sanderson and the attribution of the bonding order leading to values of 146 ± 15 and 141 ± 15 kJ mol-1 for the same adducts. For the adducts ZnCl2·2tppo and ZnBr2·2tppo (tppo = triphenylphosphineoxide), the same value of 199 ± 15 kJ mol-1 was obtained for D(ZnO), whereas for the adduct ZnCl2·2pyo (pyo = pyridine-N-oxide), the D(ZnO) value 230 ± 15 kJ mol-1 was found. The values previously reported for these tppo and pyo adducts were 184 ± 15, 169 ± 15 and 232 ± 14 kJ mol-1, respectively. By means of another thermochemical cycle the enthalpy of sublimation of the adducts was also estimated, with values close to those reported previously. © 1994. 13 1 27 37 Nigam, Nyholm, Stiddard, 359. Substituted Group VI carbonyls. Part II. The action of halogens on di(tertiary arsine)molybdenum carbonyls (1960) Journal of the Chemical Society (Resumed), p. 1806 Lewis, Whyman, The actions of halogens on phosphine-substituted Group VI metal carbonyls. Part IV. The preparation of some triphenylphosphonium halogenocarbonyl molybdenum and tungsten derivatives (1967) Journal of the Chemical Society A: Inorganic, Physical, Theoretical, p. 77 Colton, Scollary, Tomkins, Carbonyl halides of the Group VI transition metals. V. Carbon monoxide carriers and some sulphur and nitrogen derivatives of molybdenum halocarbonyls (1968) Australian Journal of Chemistry, 21, p. 15 Tsang, Meek, Wojcicki, (1968) Inorg. Chem., 7, p. 1263 Colton, Scollary, Carbonyl halides of the Group VI transition metals. XI. Dithiocyanatocarbonyl derivatives of molybdenum and tungsten(II) (1968) Australian Journal of Chemistry, 21, p. 1435 Moss, Shaw, Some tertiary phosphine and tertiary arsine complexes of molybdenum-(II), molybdenum(IV), tungsten(II), and tungsten(IV) (1970) Journal of the Chemical Society A: Inorganic, Physical, Theoretical, p. 595 Colton, (1976) Coord. Chem. Rev., 6, p. 269. , and refs cited therein Westland, Muriithi, (1973) Inorg. Chem., 12, p. 2356 Baker, Fraser, (1986) J. Organomet. Chem., 299, p. C23 Arnaiz, Garcia, Riera, Dromzée, Jeannin, Mono- and di-carbonyl complexes of molybdenum(II) with mixed bidentate ligands. X-Ray crystal structure of [MoBr2(CO)(bipy)(Ph2PCH2PPh2)](bipy = 2,2?-bipyridine): a novel type of [M(bidentate)2(unidentate)3] structure (1987) Journal of the Chemical Society, Dalton Transactions, p. 819 Baker, Fraser, Snowden, (1988) Inorg. Chim. Acta, 148, p. 247 Baker, Bury, (1989) J. Organomet. Chem., 359, p. 189 Shiu, Liou, Wang, Wei, (1990) Organometallics, 9, p. 669 Balakrishna, Krishnamurthy, Manohar, (1991) Organometallics, 10, p. 2522 Mannerskantz, Wilkinson, 862. Some sulphide carbonyl complexes of chromium, molybdenum, tungsten, and manganese (1962) Journal of the Chemical Society (Resumed), p. 4454 Planinić, Meider, (1990) Polyhedron, 9, p. 1099 Baker, ap Kendrick, (1994) J. Organomet. Chem., , in press Baker, ap Kendrick, (1990) Inorg. Chim. Acta, 174, p. 119 Drew, Seven-Coordination Chemistry (1977) Prog. Inorg. Chem., 23, p. 67. , and refs cited therein Drew, Baker, Armstrong, Fraser, (1988) Polyhedron, 7, p. 245