MOLECULAR-DYNAMICS OF TRICARBONYL(PENTAMETHYLBENZENE)-CHROMIUM - A C-13 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE STUDY

被引：11

作者：

BARRIE, PJ

MITSOPOULOU, CA

RANDALL, EW

机构：

[1] UNIV ATHENS,PANEPISTIMIOPOLIS,DEPT CHEM,INORGAN CHEM LAB,GR-15771 ATHENS,GREECE

[2] UNIV LONDON QUEEN MARY & WESTFIELD COLL,DEPT CHEM,LONDON E1 4NS,ENGLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1995年 / 13期

关键词：

D O I：

10.1039/dt9950002125

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Carbon-13 cross polarization magic angle spinning NMR spectra of [Cr(eta(6)-C(6)HMe(5))(CO)(3)] have shown unambiguously that there is rapid exchange between the CO groups at room temperature in the solid state. Chemical shift anisotropy measurements at 296 and 155 K have indicated that the angle between the C-O bond and the axis of rotation is 127.4 +/- 0.2 degrees. The activation energy barrier for the process was estimated to be 31 +/- 4 kJ mol(-1), which is significantly lower than that observed in related complexes. The aromatic group appears not to be undergoing rapid rotation at room temperature.

引用

收藏

页码：2125 / 2128

页数：4

相关论文

共 22 条

[1] DYNAMIC PROCESSES IN THE SOLID-STATE - PROTON RELAXATION STUDIES AND POTENTIAL-ENERGY BARRIER CALCULATIONS FOR (ARENE)M(CO)3 SPECIES - X-RAY CRYSTAL-STRUCTURES OF (1,2,3-C6H3ME3)CR(CO)3 AND (1,2,4,5-C6H2ME4)CR(CO)3 [J].

AIME, S ;

BRAGA, D ;

GOBETTO, R ;

GREPIONI, F ;

ORLANDI, A .

INORGANIC CHEMISTRY, 1991, 30 (05) :951-956

[2] SOLID-STATE C-13 NUCLEAR-MAGNETIC-RESONANCE INVESTIGATIONS OF MOLECULAR-DYNAMICS IN CRYSTALLINE BENZENETRICARBONYL-CHROMIUM [J].

ALIEV, AE ;

HARRIS, KDM ;

GUILLAUME, F ;

BARRIE, PJ .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1994, (21) :3193-3195

[3] DYNAMICS OF THE BENZENE MOIETY IN CRYSTALLINE BENZENETRICARBONYLCHROMIUM - POTENTIAL AND LIMITATIONS OF H-2 NMR LINE-SHAPE ANALYSIS AND H-2 NMR SPIN-LATTICE RELAXATION-TIME MEASUREMENTS [J].

ALIEV, AE ;

HARRIS, KDM ;

GUILLAUME, F .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (04) :1156-1165

[4] 3-DIMENSIONAL CRYSTAL STRUCTURE OF BENZENECHROMIUM TRICARBONYL WITH FURTHER COMMENTS ON DIBENZENECHROMIUM STRUCTURE [J].

BAILEY, MF ;

DAHL, LF .

INORGANIC CHEMISTRY, 1965, 4 (09) :1314-&

[5] STRUCTURE OF HEXAMETHYLBENZENECHROMIUM TRICARBONYL WITH COMMENTS ON DIBENZENECHROMIUM STRUCTURE [J].

BAILEY, MF ;

DAHL, LF .

INORGANIC CHEMISTRY, 1965, 4 (09) :1298-&

[6] REORIENTATIONAL PROCESSES IN SOLID (C6H6)2CR, (C6H6)CR(CO)3 AND (C6H5ME)CR(CO)3 [J].

BRAGA, D ;

GREPIONI, F .

POLYHEDRON, 1990, 9 (01) :53-61

[7] DYNAMIC PROCESSES IN CRYSTALLINE ORGANOMETALLIC COMPLEXES [J].

BRAGA, D .

CHEMICAL REVIEWS, 1992, 92 (04) :633-665

[8] SOLID-STATE STUDIES .2. RAMAN- AND INFRARED-ACTIVE CARBONYL STRETCHING VIBRATIONS OF 4 METHYLBENZENETRICARBONYLCHROMIUM COMPLEXES [J].

BUTTERY, HJ ;

KEELING, G ;

KETTLE, SFA ;

PAUL, I ;

STAMPER, PJ .

JOURNAL OF THE CHEMICAL SOCIETY A -INORGANIC PHYSICAL THEORETICAL, 1969, (15) :2224-&

[9] LOW-FREQUENCY VIBRATIONAL STUDY AND REORIENTATIONAL MOTIONS IN CR(CO)3(ETA-6-C6H6), MO(CO)3(ETA-6-C6H6), W(CO)3(ETA-6-C6H6) [J].

CHHOR, K ;

LUCAZEAU, G .

JOURNAL OF RAMAN SPECTROSCOPY, 1982, 13 (03) :235-246

[10]

DELISE P, 1975, J CHEM SOC F2, P207