Synthesis & Structural Characterization of 9-Azido-9-Boraflu - Diễn đàn
[ New messages · Members · Forum rules · Search · RSS ]
Page 1 of 11
Diễn đàn » Hóa học đại học và sau đại học » Hóa học vô cơ (Inorganic Chemistry) » Synthesis & Structural Characterization of 9-Azido-9-Boraflu (: Monomer and Cyclotrimer of a Borole)

Synthesis & Structural Characterization of 9-Azido-9-Boraflu
hieu-manuNgày: Chủ nhật, 2010-04-18, 6:59 PM | Tin nhắn # 1
Trung tá
Chức vụ: Chủ tịch HPChemC
Tổng số bài viết: 1031
Phần thưởng: 0
Danh tiếng: 24
Trạng thái: Offline
Synthesis and Structural Characterization of 9-Azido-9-Borafluorene: Monomer and Cyclotrimer of a Borole Azide

Sunanda Biswas†§, Iris M. Oppel‡ and Holger F. Bettinger*†§
† Lehrstuhl fr Organische Chemie II
‡ Lehrstuhl fr Analytische Chemie
Ruhr-Universitt Bochum, Universittsstrasse 150, 44780 Bochum, Germany
§ Institut fr Organische Chemie, Universitt Tbingen, Auf der Morgenstelle 18, 72076 Tbingen, Germany
Inorg. Chem., Article ASAP
DOI: 10.1021/ic902436s
Publication Date (Web): April 16, 2010
Copyright © 2010 American Chemical Society

The reaction of 2,2′-dilithiobiphenyl, generated from 2,2′-dibromobiphenyl and n-BuLi, with BCl3 using n-hexane as solvent provides a high-yielding, simple preparative route to 9-chloro-9-borafluorene 1a. This in turn can be reacted with trimethylsilyl azide to yield 9-azido-9-borafluorene 2. Compound 2 exists as a cyclic trimer in the solid state, but in dichloromethane solution the monomer can coexist with the trimer. Azide 2 is rather unstable both in the solid state and in solution, and it transforms with trace amounts of water and oxygen to the 1,3,5-tris(2-biphenylyl)cyclotriboroxane that was characterized by X-ray diffraction analysis. Addition of pyridine and t-butyl pyridine to azide 2 afford the corresponding pyridine adducts. Compound 1a as well as the Lewis base adducts of 2 have been characterized by multinuclear NMR spectroscopy, and the structures were confirmed by X-ray diffraction analysis. The structural features of azide 2 and the strong Lewis acidity of its boron center have also been investigated by computational chemistry techniques at the MP2 level of theory.

Read more: http://pubs.acs.org/doi/abs/10.1021/ic902436s


Nguyễn Hữu Hiệu
SDT: 0934511477
email: hh10manu@gmail.com - hh10_manu@yahoo.com
Tài khoản
- Ngân hàng đông á
- Chủ tài khoản: Nguyễn Hữu Hiệu
- Số tài khoản: 0104213252.
 
Diễn đàn » Hóa học đại học và sau đại học » Hóa học vô cơ (Inorganic Chemistry) » Synthesis & Structural Characterization of 9-Azido-9-Boraflu (: Monomer and Cyclotrimer of a Borole)
Page 1 of 11
Search:

Powered by uCoz | Website Builder Templates | Designed by game cheats