Electron paramagnetic resonance and nuclear spin echo in solutions of oxyfluorides of pentavalent molybdenum

Autor: Garif'yanov, N. S., Fedotov, V. N., Kucheryaenko, N. S.
Zdroj: Russian Chemical Bulletin; April 1964, Vol. 13 Issue: 4 p689-691, 3p
Abstrakt: 1.Acid solutions of the salts (NH4)2[MoOF5], Zn[MoOF5], K2[MoOF5],and Cu[MoOF5] dissociate into the complex anion [MoOF5] and the cations K+, Zn2+, (NH4)+, and Cu2+.2.In the complex anion [MoOF5]-2, a super hyperfine structure from the four F19 nuclei is observed as a result of the formation of covalent bonds of the ligands of F19 with the complex former.3.The long lifetime of the ligands of F19 in the complex reduces the effectiveness of Mo(V) on the nuclear relaxation of F19; when the solution temperature is raised, the effectiveness increases as a result of the decrease in the lifetime of F19 in the complex.4.In the complex [MoOF5]-2, the magnetic ion Mo(V) is found inside the octahedron formed from five covalently bonded atoms: four fluorine atoms and one oxygen atom. The fifth fluorine atom, situated in the transposition to the oxygen, possesses an ionic bond.
Databáze: Supplemental Index