Effects of axial tert-butyl substituents on conformations and geometries of saturated six-membered rings. Crystal and molecular structures of trans-2-methoxy-2-oxo-5-tert-butyl- and cis-2,5-di-tert-butyl-2-thio-1,3,2-dioxaphosphorinane

1978 ◽  
Vol 43 (22) ◽  
pp. 4266-4270 ◽  
Author(s):  
R. Wade Warrent ◽  
Charles N. Caughlan ◽  
J. Howard Hargis ◽  
K. C. Yee ◽  
Wesley G. Bentrude
Keyword(s):  
Molecular Structures ◽  
Tert Butyl ◽  
Crystal And Molecular Structures

Azaborolinyl-Komplexe, IX Die Kristall- und Molekülstrukturen von zwei Isomeren des Bis(1-tert-butyl-2-methyl-η-1.2-azaborolinyl)cobalts/Azaborolinyl Complexes, IX The Crystal and Molecular Structures of Two Isomers of Bis(1-tert-butyl-2-methyl-η-1,2-azaborolinyl)cobalt

1983 ◽  
Vol 38 (4) ◽  
pp. 485-492 ◽  
Author(s):  
Günter Schmid ◽  
Roland Boese
Keyword(s):  
Single Crystal ◽  
Cobalt Atom ◽  
Molecular Structures ◽  
X Ray Diffraction ◽  
Sandwich Complexes ◽  
X Ray ◽  
Ring Carbon ◽  
Tert Butyl ◽  
Crystal And Molecular Structures ◽  
Packing Effect

Abstract The crystal and molecular structures of two isomers of bis(1-tert-butyl-2-methyl-η-1,2-azaborolinyl)cobalt have been determined by single-crystal X-ray diffraction methods. Isomer 1 shows a clockwise, isomer 2 an anti-clockwise conformation of the azaborolinyl rings. In both compounds the azaborolinyl rings have staggered orientations with opposite positions of the tert-butyl groups. The rings in 1 and 2 are slipped so that the three ring carbon atoms are closer to the cobalt atom than the BN groups. The staggered orientation of the ligands in 2 is probably due to a packing effect, as in similar sandwich complexes the anti-clockwise conformers show eclipsed orientation.

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