Magnetic isotope effect in the photolysis of organotin compounds

被引：10

作者：

Buchachenko, AL ^{[1
]}

Ivanov, VL ^{[1
]}

Roznyatovsky, VA ^{[1
]}

Ustynyuk, YA ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2006年 / 110卷 / 11期

关键词：

D O I：

10.1021/jp060592t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photolysis of organotin molecules RSnMe3 is shown to be a spin selective radical reaction accompanied by fractionation of magnetic, Sn-117,Sn-119, and nonmagnetic, Sn-118,Sn-120, isotopes between starting reagents and products. A primary photolysis process is a homolytic cleavage of the C-Sn bond and generation of a triplet radical pair as a spin-selective nanoreactor. Nuclear spin dependent triplet-singlet conversion of the pair results in the tin isotope fractionation. Experimentally detected isotope distribution unambiguously demonstrates that the classical, mass-dependent isotope effect is negligible in comparison with magnetic, spin-dependent isotope effect.

引用

页码：3857 / 3859

页数：3

共 10 条

[1]

BUCHACHENKO AL, 1976, DOKL AKAD NAUK SSSR+, V228, P379

[2] Magnetic isotope effect: Nuclear spin control of chemical reactions [J].

Buchachenko, AL .

JOURNAL OF PHYSICAL CHEMISTRY A, 2001, 105 (44) :9995-10011

[3] MIE VERSUS CIE - COMPARATIVE-ANALYSIS OF MAGNETIC AND CLASSICAL ISOTOPE EFFECTS [J].

BUCHACHENKO, AL .

CHEMICAL REVIEWS, 1995, 95 (07) :2507-2528

[4] SUBSTITUENT EFFECT OF TRIMETHYLSTANNYLMETHYL GROUP, STUDIED BY C-13 NUCLEAR MAGNETIC-RESONANCE [J].

BULLPITT, M ;

KITCHING, W ;

ADCOCK, W ;

DODDRELL, D .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1976, 116 (02) :187-198

[5] Preparation of bifluorenes via the synthesis and thermal decomposition of fluorenyltitanium(IV) trichlorides.: Molecular and crystal structure of 9,9′-bis(trimethylsilyl)-bi-9,9′-fluorene [J].

Knjazhanski, SY ;

Moreno, G ;

Cadenas, G ;

Belsky, VK ;

Bulychev, BM .

TETRAHEDRON, 1999, 55 (06) :1639-1646

[6]

LEHNIG M, 1980, B SOC CHIM BELG, V89, P907

[7]

PODOPLELOV AV, 1979, JETP LETT+, V29, P380

[8]

PODOPLELOV AV, 1985, RUSS CHEM B, V34, P2041

[9] NMR spectra and isotope analysis of hexaethyldistannane [J].

Roznyatovskii, VA ;

Roznyatovskii, VV ;

Ustynyuk, YA .

RUSSIAN CHEMICAL BULLETIN, 2004, 53 (10) :2196-2199

[10]

Roznyatovskii VA, 2004, RUSS J PHYS CHEM+, V78, P1277

← 1 →