scholarly journals The Molecular and Crystal Structure of tert-Butyl N.ALPHA.-tert-Butoxycarbonyl-L-(S-trityl)cysteinate and the Conformation-Stabilizing Function of Weak Intermolecular Bonding.

2001 ◽  
Vol 49 (4) ◽  
pp. 418-423 ◽  
Author(s):  
Anna Eugenia KOZIOL ◽  
Beata SZADY ◽  
Elzbieta MASIUKIEWICZ ◽  
Barbara RZESZOTARSKA ◽  
Malgorzata Anna BRODA
Keyword(s):  
Crystal Structure ◽  
Molecular And Crystal Structure ◽  
Tert Butyl ◽  
Intermolecular Bonding

1,3,5-Tri-tert-butyl-2,4,6-triisopropyl-3,5-diaza-1-azonia-2,6-dibora- 4-borata[2.2.0]bicyclohexan, der erste Vertreter der Dewarborazine/ 1,3,5-Tri-tert-butyl-2,4,6-triisopropyl-3,5-diaza-1-azonia-2,6-dibora- 4-borata[2.2.0]bicyclohexane, the First Dewar Borazine

1984 ◽  
Vol 39 (8) ◽  
pp. 1069-1075 ◽  
Author(s):  
Peter Paetzold ◽  
Christoph von Plotho ◽  
Günter Schmid ◽  
Roland Boese
Keyword(s):  
Crystal Structure ◽  
Elevated Temperatures ◽  
Molecular And Crystal Structure ◽  
Single Bond ◽  
Double Bonds ◽  
Tert Butyl ◽  
Type Molecule

AbstractThe iminoborane iPr-B ≡ N -tBu (1a), metastable at -78 °C, trimerizes to form (iPrBNtBu)3 (4a) at elevated temperatures. The determination of the molecular and crystal structure reveals 4a to be a Dewar-borazine-type molecule with two short peripheral BN-double-bonds (136 and 138 pm) and an extra-long bridge BN-single-bond (175 pm). The same trimer 4a is formed by addition of la to the diazadiboretidine-type dimer (iPrBNtBu)2, prepared independently. The ethyloboration and the azidoboration of la with BEt3 and Me3SiN3, respectively, and the cycloaddition of PhN3 to 1a follow expected patterns.

Molecular and crystal structure of 4?, 5?-dimethyl-3?, 6?-di-tert-butyl-2-phenoxy-4, 5; 7,8-dibenzo-6h-1,3,2-dioxaphosphocin

1985 ◽  
Vol 25 (6) ◽  
pp. 943-947
Author(s):  
I. A. Litvinov ◽  
Yu. T. Struchkov ◽  
B. A. Arbuzov ◽  
R. P. Arshinova ◽  
O. V. Ovodova
Keyword(s):  
Crystal Structure ◽  
Molecular And Crystal Structure ◽  
Tert Butyl
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