Coordination d'anions organophosphores

Coordination of organophosphorus anions. 6. Characterization of nitrato complexes of cobalt(II), nickel(II), and zinc(II). Crystal and molecular structure of the dimeric nitrato(.gamma.-piperidino-.beta.-ketophosphonato)cobalt(II)

“…However, a significant deshielding of 0.1 ppm in the complexes containing La~o ccurs with respect to the series of the halógeno complexes (ZnXL)2 with the same L~l igands, in which the nitrogen atom is not involved in any coordination bonding. 3 In the (ZnXLb)2 compounds, the contrary effect is observed ( 5' = 2.95 ppm for X~= Cl" and 5' = 2.84 ppm for X-= N03"); this is not surprising, since it is known that coordination may also affect protons close to the donor center31 and leads to a new electronic distribution. The most interesting feature of this study is that intramolecular exchange occurs between the CH2 groups adjacent to nitrogen in the (Zn(N03)Lb)2 complex.…”

Coordination d'anions organophosphorés. IV. Préparation et identification cristallographique de différentes phases de nitratocomplexes du cobalt(II), du nickel(II) et du zinc(II)

“…Les 616ments C, H, N, P ainsi que les ions m6talliques Co 2 + et Zn 2 + ont 6t6 analys6s comme pr6c6demment , 1974, 1976a: Youinou, Guerchais & Sturtz, 1973: le dosage du nickel est effectual par la m6thode de I'EDTA, celui du nitrate par la technique de Dewarda (Chariot, 1966). Nous donnons, titre d'exemple, les pourcentages exp6rimentaux (entre parenth6ses, valeurs th6oriques) obtenus pour le compos6 {Ni(NO3)L, },C" 30,0 (30,28): H" 5,4 (5,36): N" 7,8 (7,85): P: 8,4(8,67): Ni: 16,4(16,45): NO3:17,1 (17,37).…”