AN NMR INVESTIGATION OF 1,2-METALLOTROPIC SHIFTS IN TRANSITION-METAL COMPLEXES OF BENZO[C]CINNOLINE AND PYRIDAZINES

被引：16

作者：

ABEL, EW ^{[1
]}

BLACKWALL, ES ^{[1
]}

ORRELL, KG ^{[1
]}

SIK, V ^{[1
]}

机构：

[1] UNIV EXETER,DEPT CHEM,EXETER EX4 4QD,DEVON,ENGLAND

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1994年 / 464卷 / 02期

关键词：

TUNGSTEN; RHODIUM; PYRIDAZINE; NUCLEAR MAGNETIC RESONANCE; METALLOTROPIC SHIFT;

D O I：

10.1016/0022-328X(94)87270-8

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complexes of types [W(CO)(5)L], [cis-Rh(CO)(2)C1L] (L = benzo[c]cinnoline) and [W(CO)(5)L'] (L' = pyridazine, 3-methylpyridazine, and 4-methylpyridazine) have been synthesized and shown to exhibit, in organic solvents, intramolecular metal-nitrogen 1,2-fluxional shifts, which have been quantitatively studied by ID bandshape analysis and 2D-EXSY NMR experiments. Energy barriers for the metallotropic shifts in the pyridazine complexes are ca. 20 kJ mol(-1) higher than in the benzo[c]cinnoline complexes. These differences are discussed in terms of the ground state and likely transition state species for this fluxional process.

引用

页码：163 / 170

页数：8

共 50 条

[21] 1,2-DIFLUOROBENZENE - A RELATIVELY INERT AND NONCOORDINATING SOLVENT FOR ELECTROCHEMICAL STUDIES ON TRANSITION-METAL COMPLEXES
OTOOLE, TR
YOUNATHAN, JN
SULLIVAN, BP
MEYER, TJ
INORGANIC CHEMISTRY, 1989, 28 (20) : 3923 - 3926
[22] TRANSITION-METAL COMPLEXES OF THE 1,2-DIHAPTO-4-CYANO-5-AMINO-PYRAZOLIDE ION
SHAKIR, M
KUMAR, D
SIDDIQI, ZA
TRANSITION METAL CHEMISTRY, 1991, 16 (06) : 631 - 633
[23] SOME TRANSITION-METAL COMPLEXES OF 1,2-BIS(DI-PARA-TOLYLPHOSPHINO)ETHANE
MERCYKUTTY, PC
SINGH, B
KAPOOR, PN
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY, 1989, 28 (04): : 328 - 330
[24] Structure, solvent, and relativistic effects on the NMR chemical shifts in square-planar transition-metal complexes: assessment of DFT approaches
Vicha, Jan
Novotny, Jan
Straka, Michal
Repisky, Michal
Ruud, Kenneth
Komorovsky, Stanislav
Marek, Radek
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2015, 17 (38) : 24944 - 24955
[25] Insights into trans-Ligand and Spin-Orbit Effects on Electronic Structure and Ligand NMR Shifts in Transition-Metal Complexes
Greif, Anja H.
Hrobarik, Peter
Kaupp, Martin
CHEMISTRY-A EUROPEAN JOURNAL, 2017, 23 (41) : 9790 - 9803
[26] DYNAMIC H-1-NMR SPECTROSCOPY OF ETA-2-ETHYLENE TRANSITION-METAL COMPLEXES
BENN, R
ORGANIC MAGNETIC RESONANCE, 1983, 21 (12): : 723 - 726
[27] NMR INVESTIGATION OF METAL-LIGAND BONDING IN SOME TRANSITION-METAL COMPLEXES OF BICYCLO[3,3,1]NONA-2,6-DIENE
BISHOP, R
AUSTRALIAN JOURNAL OF CHEMISTRY, 1978, 31 (07) : 1485 - 1492
[28] TRANSITION-METAL NMR - SPECTROSCOPY .3. DIRECT OBSERVATION OF RH-103-CHEMICAL SHIFTS IN MONONUCLEAR AND DINUCLEAR OLEFIN COMPLEXES
MAURER, E
RIEKER, S
SCHOLLBACH, M
SCHWENK, A
EGOLF, T
VONPHILIPSBORN, W
HELVETICA CHIMICA ACTA, 1982, 65 (01) : 26 - 45
[29] 1,2-BIS-(TRIPHENYLPHOSPHORANE-YLIDENE-AMINO)ETHANE AS A BIDENTATE LIGAND IN TRANSITION-METAL COMPLEXES
APPEL, R
VOLZ, P
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1975, 413 (01): : 45 - 50
[30] A DFT Protocol for the Prediction of 31P NMR Chemical Shifts of Phosphine Ligands in First-Row Transition-Metal Complexes
Payard, Pierre-Adrien
Perego, Luca Alessandro
Grimaud, Laurence
Ciofini, Ilaria
ORGANOMETALLICS, 2020, 39 (17) : 3121 - 3130

← 1 2 3 4 5 →