Multinuclear NMR spectra, 1H-T1 relaxation, conformational behavior, and intramolecular Hδ-....δ+H contacts of N-borane cyclic adducts in solution

被引：22

作者：

Güizado-Rodríguez, M

Flores-Parra, A

Sánchez-Ruiz, SA

Tapia-Benavides, R

Contreras, R

Bakhmutov, VI

机构：

[1] IPN, Ctr Invest & Estudios Avanzados, Dept Chem, Mexico City 07000, DF, Mexico

[2] Univ A Estado Hidalgo, Ctr Invest Quim, Pachuca 42074, Hidalgo, Mexico

来源：

INORGANIC CHEMISTRY | 2001年 / 40卷 / 13期

关键词：

D O I：

10.1021/ic000890j

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The VT H-1 NMR and H-1-NOESY spectra revealed "frozen" envelope conformations in solutions of 1 and 2 with the BR3 groups in equatorial positions. The H-1-T-1 relaxation measurements provided determinations of the intramolecular proton-hydride contacts in solutions of adducts 1 and 8.

引用

收藏

页码：3243 / +

页数：5

相关论文

共 24 条

[1]

ABRAGAM A, 1971, PRINCIPLES NUCL MAGN

[2]

ARIZACASTOLO A, 1994, CURRENT TOPICS CHEM, P90

[3] First NMR observation of the intermolecular dynamic proton transfer equilibrium between a hydride and coordinated dihydrogen: (dppm)(2)HRuH center dot center dot center dot H-OR=[(dppm)(2)HRu(H-2)](+)(OR)(-) [J].

Ayllon, JA ;

Gervaux, C ;

SaboEtienne, S ;

Chaudret, B .

ORGANOMETALLICS, 1997, 16 (10) :2000-2002

[4]

Bakhmutov VI, 1998, REV INORG CHEM, V18, P183

[5] NEW LIGANDS FOR ASYMMETRIC PALLADIUM-CATALYZED ALLYLIC SUBSTITUTION-REACTIONS - X-RAY CRYSTAL-STRUCTURES OF 2 ENANTIOMERICALLY PURE DIHYDROBENZAZAPHOSPHOLE-BORANE COMPLEXES [J].

BRENCHLEY, G ;

FEDOULOFF, M ;

MAHON, MF ;

MOLLOY, KC ;

WILLS, M .

TETRAHEDRON, 1995, 51 (38) :10581-10592

[6] N-BORANE ADDUCTS OF OXAZOLIDINES DERIVED FROM EPHEDRINE AND PSEUDOEPHEDRINE - STUDY OF STEREOCHEMISTRY BY NUCLEAR MAGNETIC-RESONANCE [J].

CONTRERAS, R ;

SANTIESTEBAN, F ;

PAZSANDOVAL, MA ;

WRACKMEYER, B .

TETRAHEDRON, 1984, 40 (19) :3829-3838

[7] ASSESSMENT OF THE T1 CRITERION FOR DISTINGUISHING BETWEEN CLASSICAL AND NONCLASSICAL TRANSITION-METAL HYDRIDES - HYDRIDE RELAXATION RATES IN TRIS(TRIARYLPHOSPHINE)OSMIUM TETRAHYDRIDES AND RELATED POLYHYDRIDES [J].

DESROSIERS, PJ ;

CAI, LH ;

LIN, ZR ;

RICHARDS, R ;

HALPERN, J .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1991, 113 (11) :4173-4184

[8] Unusual hydrogen bonds with a hydride atom in boron hydrides acting as proton acceptor. Spectroscopic and theoretical studies [J].

Epstein, LM ;

Shubina, ES ;

Bakhmutova, EV ;

Saitkulova, LN ;

Bakhmutov, VI ;

Chistyakov, AL ;

Stankevich, IV .

INORGANIC CHEMISTRY, 1998, 37 (12) :3013-3017

[9]

Flores-Parra A, 1999, EUR J INORG CHEM, P2069

[10] NMR-STUDY OF THE EFFECT OF NITROGEN-BORANE COORDINATION ON THE CONFORMATIONAL EQUILIBRIUM OF 6 MEMBERED RING HETEROCYCLES [J].

FLORESPARRA, A ;

FARFAN, N ;

HERNANDEZBAUTISTA, AI ;

FERNANDEZSANCHEZ, L ;

CONTRERAS, R .

TETRAHEDRON, 1991, 47 (34) :6903-6914