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Molecules 2015, 20(8), 14435-14450; doi:10.3390/molecules200814435

Molecular Structures of the Products of a Diphosphonate Ester Building Block with Lewis Bases

1,2
and
1,2,*
1
Microscale Science Institute, Weifang University, Weifang 261061, China
2
New Materials and Function Coordination Chemistry Lab, Qingdao University of Science & Technology, Qingdao 266042, China
*
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 29 December 2014 / Revised: 18 June 2015 / Accepted: 23 June 2015 / Published: 7 August 2015
(This article belongs to the Section Organic Synthesis)
View Full-Text   |   Download PDF [2410 KB, uploaded 7 August 2015]   |  

Abstract

By treating a suitable Wittig reagent under acid conditions, the phosphonate ester 1,4-bimethylenebenzene phosphonate ethyl ester (H2[BBPE], 1) was obtained. As a building block, compound 1 has been reacted with the Lewis-base N,N-dimethylpiperazine, ammonia and NaOH yielded compounds 24. The crystal structures show that a 1D chain forming a tubular channel is constructed through hydrogen bonds in 1; hydrogen bonds form two 1D chains with left-hand and right-hand helixes and form 3D networks in compound 2; 1D hydrogen-bond chains are further connected together to afford a 3D network architecture in compound 3; the phosphonate is coordinated by two Na atoms which present different coordination environments in compound 4. Additionally, the relationships between the structure and fluorescence of the four compounds in the solid state and in different solvents have also been studied at room temperature. View Full-Text
Keywords: phosphonate ester; synthesis; crystal structure; fluorescence phosphonate ester; synthesis; crystal structure; fluorescence
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Li, Y.; Jian, F. Molecular Structures of the Products of a Diphosphonate Ester Building Block with Lewis Bases. Molecules 2015, 20, 14435-14450.

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