About this Chemistry article
Supramolecular Hydrogen-bonded Structures in Organic Amine Squarates by Suresh Mathew; Geo Paul; K. Shivasankar; Amitava Choudhury; C.N.R. Rao is a Chemistry article available to read on EtoBox.
Structures of monohydrogen squarates of methylamine, ethylenediamine, 1,3-diaminopropane, 1,4-diaminobutane, 1,5diaminopentane, N,N 0 -diemethylpiperazine and N,N,N 0 ,N 0 -tetramethylguanidine have been studied in detail. The supramolecular hydrogen-bonded molecular networks are formed by the monoanion of squaric acid by itself or in association with the parent acid. Three types of hydrogen-bonded motifs are observed in these compounds, namely a liner chain, a cyclic dimer and a cyclic tetramer. These hydrogen-bonded motifs formed by the squaric acid species interact with the amine through N -H• • •O hydrogen-bonding and give rise to predominantly layered structures, while some of them also exhibit three-dimensional structures. Two of the monohydrogen squarate structures also exhibit p-p interactions between two squarate rings. The various hydrogen-bonding parameters in the amine squarates are discussed at length.
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- Author
- Suresh Mathew; Geo Paul; K. Shivasankar; Amitava Choudhury; C.N.R. Rao
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-2860)
- Published
- 2002
- Language
- EN
- Field
- Chemistry (Physical Sciences)