Determination of the Rotational Barrier for Kinetically Stable Conformational Isomers via NMR and 2D TLC

2007 ◽  
Vol 84 (9) ◽  
pp. 1499 ◽  
Author(s):  
Gregory T. Rushton ◽  
William G. Burns ◽  
Judi M. Lavin ◽  
Yong S. Chong ◽  
Perry Pellechia ◽  
...  
Keyword(s):  
Rotational Barrier ◽  
Conformational Isomers

Über neue monocyclische Acyloxyfluoroborane 2.2.6.6-Tetrafluoro-1.4-dialkyl-1.3.5-trioxa-1.6-diboracyclohexene: Darstellung, Molekül- und Kristallstruktur/ New Monocyclic Acyloxyfluoroboranes 2,2,6,6-Tetrafluoro-1,4-dialkyl-1,3,5-trioxa-2,6-diboracyclohexenes: Synthesis, Molecular and Crystal Structure

1983 ◽  
Vol 38 (5) ◽  
pp. 554-558 ◽  
Author(s):  
Herbert Binder ◽  
Walter Matheis ◽  
Hans-Jörg Deiseroth ◽  
Han Fu-Son
Keyword(s):  
Crystal Structure ◽  
Organic Acid ◽  
Structure Determination ◽  
Unit Cell ◽  
Ring Conformation ◽  
X Ray ◽  
Conformational Isomers ◽  
Ring Group ◽  
Acid Anhydrides

Abstract Acyloxyfluoroboranes Trimeric alkoxydifluoroboranes (F2BOR)3 (2) react with organic acid anhydrides by substitution of a ring group OR forming monocyclic acyloxyfluoroboranes of the type 2,2,6,6-tetrafluoro-l,4-dialkyl-l,3,5-trioxa-2,6-diboracyclohexene (3). The X-ray crystal structure determination of 3a shows two conformational isomers: two planar and two non-planar six-membered rings are present in the unit cell. The ring conformation is influenced by weak intermolecular H — F interactions.

X-ray crystallographic determination of absolute configurations and conformations of two conformational isomers of 1,2,3,4-dibenzo-trans-6,7-dibromo-1,3-cyclooctadiene, a 2,2'-bridged biphenyl

1990 ◽  
Vol 112 (3) ◽  
pp. 1185-1190 ◽  
Author(s):  
Bozena Borecka ◽  
T. Stanley Cameron ◽  
Anthony Linden ◽  
Parviz Rashidi-Ranjbar ◽  
Jan Sandstroem
Keyword(s):  
X Ray ◽  
Conformational Isomers
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