Pyrazole complexes of acyloxydialkylboranes

Marek Da̧browski , Tomasz Kliś , Sergiusz Luliński , Izabela Madura , Janusz Serwatowski , Janusz Zachara

Abstract

The reaction of Me3CCOOBEt2 with pyrazole led to the formation of the stable addition complex 1, which was found to be monomeric in solution. The reaction of 9-H-9-borabicyclo[3.3.1]nonane (9-H-9-BBN)2 with pyrazole and pivalic acid yielded a similar complex Me3CCOO(9-BBN)-pzH 2. Crystallographic analysis of 2 revealed a dimeric structure due to the strong hydrogen bonding between azole hydrogen and carbonyl oxygen. The one boron–carbon bond of compound 1 cleaves readily with triethylborane at 20°C with the evolution of ethane, giving a species Me3CCOO(BEt2)2pz 3 with a seven-membered heterocyclic ring as the main structural feature.
Author Marek Da̧browski ZChF
Marek Da̧browski,,
- Department Of Physical Chemistry
, Tomasz Kliś ZChF
Tomasz Kliś,,
- Department Of Physical Chemistry
, Sergiusz Luliński ZChF
Sergiusz Luliński,,
- Department Of Physical Chemistry
, Izabela Madura KChNTCS
Izabela Madura,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Janusz Serwatowski ZChF
Janusz Serwatowski,,
- Department Of Physical Chemistry
, Janusz Zachara KChNTCS
Janusz Zachara,,
- Chair Of Inorganic Chemistry And Solid State Technology
Journal seriesJournal of Organometallic Chemistry, ISSN 0022-328X
Issue year1998
Vol570
No1
Pages31-37
Keywords in EnglishAcyloxyboranes, Crystal structure, NMR spectroscopy, Pyrazaboles, Pyrazole
DOIDOI:10.1016/S0022-328X(98)00824-9
URL http://www.sciencedirect.com/science/article/pii/S0022328X98008249
Languageen angielski
Score (nominal)30
Publication indicators WoS Impact Factor: 2006 = 2.332 (2) - 2007=2.097 (5)
Citation count*8 (2015-04-26)
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