Crystal Structure of Bovine Low Molecular Weight Phosphotyrosyl Phosphatase Complexed with the Transition State Analog Vanadate†,‡

Biochemistry ◽  
1997 ◽  
Vol 36 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Marie Zhang ◽  
Ming Zhou ◽  
Robert L. Van Etten ◽  
Cynthia V. Stauffacher
Keyword(s):  
Crystal Structure ◽  
Molecular Weight ◽  
Transition State ◽  
Low Molecular Weight ◽  
Transition State Analog

scholarly journals Synthesis of a Chiral Meso-Like Ansa-Zirconocene Complex and its Use for the Catalytic Formation of Low Molecular Weight Polypropylene

1995 ◽  
Vol 50 (6) ◽  
pp. 982-989 ◽  
Author(s):  
Sven Thiele ◽  
Gerhard Erker ◽  
Cornelia Fritze ◽  
Christian Psiorz ◽  
Roland Fröhlich
Keyword(s):  
Crystal Structure ◽  
Molecular Weight ◽  
Double Bond ◽  
Ambient Temperature ◽  
Organic Synthesis ◽  
Crystal Structure Analysis ◽  
Low Molecular Weight ◽  
X Ray ◽  
Catalyst Systems ◽  
Double Bond Shift

Reaction of lithium(neomenthylcyclopentadienid) 3 with dimethyldichlorosilane gives dimethylbis[3-(neomenthyl)cyclopentadienyl]silane 4 regioselectively as a mixture of double bond shift isomers (57% isolated). Deprotonation with 2 equiv. of butyllithium followed by treatment with zirconiumtetrachloride furnished a mixture of the three {dimethylsilylenbis[η5-3-(neomenthyl)cyclopentadienyl][zirconium dichloride diastereomers from which the pure meso-like isomer 6e [p -R (1′S ,3 ′R ,4 ′R),p -S (1′S ,3 ′R ,4 ′R)] was isolated by fractional crystallization. Complex 6 c was characterized by an X-ray crystal structure analysis. Its D 1 - Zr - D 2 angle of 126.8° is very similar as observed in bis(η-cyclopentadienyl) zirconium dichloride (D 1 and D 2 denote the centroids of the cyclopentadienyl rings). The homogeneous 6c/methylalumoxane Ziegler-type catalyst produces polypropylene of low molecular weight (Mη ≈ 670 at ambient temperature). Related catalyst systems may find interesting applications in organic synthesis.

Bridged Lamellae:  Crystal Structure(s) of Low Molecular Weight Linear Polyethylene

1999 ◽  
Vol 32 (1) ◽  
pp. 162-166 ◽  
Author(s):  
Douglas L. Dorset
Keyword(s):  
Crystal Structure ◽  
Molecular Weight ◽  
Low Molecular Weight ◽  
Linear Polyethylene

Cytidine Deaminase. The 2·3 Å Crystal Structure of an Enzyme: Transition-state Analog Complex

1994 ◽  
Vol 235 (2) ◽  
pp. 635-656 ◽  
Author(s):  
Laurie Betts ◽  
Shibin Xiang ◽  
Steven A. Short ◽  
Richard Wolfenden ◽  
Charles W. Carter
Keyword(s):  
Crystal Structure ◽  
Transition State ◽  
Cytidine Deaminase ◽  
Transition State Analog

scholarly journals Crystal structure of the complex of a catalytic antibody Fab fragment with a transition state analog: structural similarities in esterase-like catalytic antibodies.

1995 ◽  
Vol 92 (25) ◽  
pp. 11721-11725 ◽  
Author(s):  
J. B. Charbonnier ◽  
E. Carpenter ◽  
B. Gigant ◽  
B. Golinelli-Pimpaneau ◽  
Z. Eshhar ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transition State ◽  
Catalytic Antibodies ◽  
Catalytic Antibody ◽  
Fab Fragment ◽  
Transition State Analog
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