BIROn - Birkbeck Institutional Research Online

Syntheses, spectroscopic properties and stereochemistry of Bis-C-Pivot macrocycles with two Dialkyl Phosphonate groups

Bilge, S. and Kilic, Z. and Davies, David B. (2011) Syntheses, spectroscopic properties and stereochemistry of Bis-C-Pivot macrocycles with two Dialkyl Phosphonate groups. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 81 (1), pp. 441-448. ISSN 1386-1425.

Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.saa.2011.06.034

Abstract

Bis-C-pivot macrocycles containing dimethyl (1a, 2a) or diethyl phosphonate (1b, 2b) groups have been prepared by adding dimethyl or diethyl phosphite to two–CH = N bonds in corresponding dibenzo-bis-imino crown ethers (1 and 2). Bis-C-pivot macrocycles posses two equivalent stereogenic centres giving rise to diastereoisomers (meso and racemate). The structures were characterized by elemental analysis, FTIR, MS, TGA, DSC and NMR measurements. 1H, 13 C and 31P NMR assignments were made for the isolated meso form of compounds 2a and 2b and for the meso and racemic forms of compounds 1a and 1b by analysis of chemical shifts, signal intensities and splitting patterns and the DEPT and 2D HETCOR NMR techniques. Thermal analysis and 1H NMR showed that the crystallised form of compound 1a contained an equimolar amount of water of crystallisation.

Item Type: Article
Keyword(s) / Subject(s): Bis-C-pivot macrocycles, bisphosphonates, diastereoisomers, NMR assignments, meso form, racemic form
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Biological Sciences
Depositing User: Administrator
Date Deposited: 24 Jun 2011 07:53
Last Modified: 17 Apr 2013 12:21
URI: http://eprints.bbk.ac.uk/id/eprint/3756

Archive Staff Only (login required)

Edit/View Item Edit/View Item