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

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.

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