Detection of an alkyl ethylene complex during ethylene polymerization by a cobalt(III) catalyst. Energetics of the .beta.-migratory insertion reaction

1990 ◽  
Vol 112 (14) ◽  
pp. 5634-5636 ◽  
Author(s):  
M. Brookhart ◽  
A. F. Volpe ◽  
D. M. Lincoln ◽  
I. T. Horvath ◽  
J. M. Millar
Keyword(s):  
Ethylene Polymerization ◽  
Insertion Reaction ◽  
Migratory Insertion

Syntheses and reactivity of square-planar Rh(I) complexes, LRh(CO) (L = unsymmetric tridentate chelating pyrazolylgallate ligand). X-ray crystal structures of [Me2Gapz(OCH2CH2NH2)]Rh(CO) and [Me2Gapz(OCH2CH2NMe2)]Rh(COMe)I (pz = pyrazolyl, N2C3H3)

1985 ◽  
Vol 63 (11) ◽  
pp. 3019-3026 ◽  
Author(s):  
Brenda M. Louie ◽  
Steven J. Rettig ◽  
Alan Storr ◽  
James Trotter
Keyword(s):  
Crystal Structures ◽  
Heavy Atom ◽  
Least Square ◽  
Insertion Reaction ◽  
Space Group ◽  
Physical Measurements ◽  
Square Planar ◽  
Migratory Insertion ◽  
Complex Crystal

The syntheses and characterization of a number of square-planar Rh(I) monocarbonyl complexes incorporating un-symmetrical, tridentate, pyrazolylgallate ligands in a meridional coordination mode are described. Oxidative addition reactions of these complexes are detailed and a facile migratory insertion reaction, following the addition of methyl iodide, has resulted in a five-coordinate square-pyramidal Rh(III) acetyl complex. Crystal structures of two compounds are presented, [Me2Gapz(OCH2CH2NH2)]Rh(CO) and [Me2Gapz(OCH2CH2NMe2)]Rh(COMe)I, and confirm the molecular arrangements predicted on the basis of other physical measurements. Crystals of the former are monoclinic, a = 10.212(2), b = 7.8484(5), c = 16.733(2) Å, β = 105.133(6)°, z = 4, space group P21/c; and those of the latter are monoclinic, a = 10.0960(11), b = 11.5352(8), c = 15.871(2) Å, β = 105.764(6)°, z = 4, space group P21/n. Both structures were solved by conventional heavy atom methods and were refined by full-matrix least-square procedures to R = 0.026 and 0.036, respectively, for 2142 and 2941 reflections with I ≥ 3σ(I).

Rearrangement of Tridentate [OSO]-Type Ligands and Migratory Insertion Reaction Mechanisms in Cyclopentadienyl Tantalum Complexes

2012 ◽  
Vol 31 (20) ◽  
pp. 7052-7062 ◽  
Author(s):  
Jacob Fernández-Gallardo ◽  
Luca Bellarosa ◽  
Gregori Ujaque ◽  
Agustí Lledós ◽  
María José Ruiz ◽  
...  
Keyword(s):  
Reaction Mechanisms ◽  
Insertion Reaction ◽  
Migratory Insertion

Migratory insertion reaction of a phosphenium ligand into Mo and Walkyl bonds

1997 ◽  
Vol 529 (1-2) ◽  
pp. 423-433 ◽  
Author(s):  
Hiroshi Nakazawa ◽  
Mitsuru Kishishita ◽  
Shizuyo Yoshinaga ◽  
Yoshitaka Yamaguchi ◽  
Tsutomu Mizuta ◽  
...  
Keyword(s):  
Insertion Reaction ◽  
Migratory Insertion
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