/sup 31/P and /sup 119/Sn NMR of adducts of tin tetrahalides with tertiary phosphines

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · Sov. J. Coordinat. Chem.; (United States)

OSTI ID:6509651

Yashina, N S; Gefel, E I; Kosina, A N; Petrosyan, V S; Reutov, O A

The donor-acceptor interaction of SnX/sub 4/ (X = Cl, Br) with tertiary phosphines (nBu/sub 3/P, Me/sub 2/PhP, Ph/sub 3/P) has been studied by /sup 31/P and /sup 119/Sn spectroscopy over a broad range of temperatures and with varous donor-acceptor ratios (D/A) in solutions in methylene chloride. An analysis of the direct spin-spin coupling constants /sup 1/J(/sup 119/Sn-/sup 31/P) and the multiplicity in the /sup 119/Sn NMR spectra made it possible to propose a complexation mechanism, which includes the formation of intermediate ionic structures along with the molecular complexes AD and AD/sub 2/. It has been shown that an excess of the acceptor is not a sufficient condition for the formation of the complex AD. The coexistence of cis and trans isomers of the AD/sub 2/ complexes in solution has been established, and the dependence of /sup 1/J(/sup 119/Sn-/sup 31/P) on the geometry of the P-Sn-P fragment in the octahedral complexes has been demonstrated. The use of low-temperature NMR made it possible, in most cases, to suppress the occurrence of the redox reaction between the compounds of Sn(IV) and the tertiary phosphines.

• Research Organization: M.V. Lomonosov Moscow State Univ.
• OSTI ID: 6509651
• Journal Information: Sov. J. Coordinat. Chem.; (United States), Journal Name: Sov. J. Coordinat. Chem.; (United States) Vol. 11:12; ISSN SJCCD
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADDUCTS
BINDING ENERGY
BROMIDES
BROMINE COMPOUNDS
CHEMICAL REACTIONS
CHEMICAL SHIFT
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
COMPLEXOMETRY
COORDINATION VALENCES
COUPLING
COUPLING CONSTANTS
DAYS LIVING RADIOISOTOPES
ELECTRONIC STRUCTURE
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
EVEN-ODD NUCLEI
FERMIONS
HALIDES
HALOGEN COMPOUNDS
INTERMEDIATE COUPLING
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
J-J COUPLING
LEPTONS
LIGHT NUCLEI
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
PHOSPHINES
PHOSPHORUS 31
PHOSPHORUS COMPOUNDS
PHOSPHORUS ISOTOPES
RADIOISOTOPES
REDOX REACTIONS
SPECTRA
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
TIN 119
TIN BROMIDES
TIN CHLORIDES
TIN COMPLEXES
TIN COMPOUNDS
TIN HALIDES
TIN ISOTOPES
VALENCE