Preparation of open and closed forms of the lvt network with Cu(II) complexes of structurally related 1,2-diazole ligands

Hawes, Chris S.; Kruger, Paul E.

Abstract

Reported here are the synthesis and structural characterisation of two topologically related coordination polymers: [Cu(L1)(CH3CONH2)], 1, and [Cu(L2)(NMP)]·0.5NMP·0.5H2O, 2, (NMP = N-methyl-pyrrolidinone) prepared from 1H-indazole-3-carboxylic acid, H2L1, and 1H-pyrazole-3-carboxylic acid, H2L2, respectively. Both 1 and 2 crystallise in the tetragonal space group I41/a and form 3-dimensional coordination polymers described by the lvt topology, in which [Cu2L2] dimers form four-connected nodes linked through carboxylate groups. Within 1 the presence of a Cu-bound acetamide molecule (formed in situ by the solvothermal hydration of acetonitrile) propagates hydrogen bonding between dimer units that, combined with the steric bulk of the indazole fragment, yield a closed (non-porous) framework. In 2, however, Cu-bound NMP, which does not participate in hydrogen bonding, coupled with the less bulky nature of the pyrazole-backbone, gives rise to an open framework of an otherwise isostructural network.

Citation

Hawes, C. S., & Kruger, P. E. (in press). Preparation of open and closed forms of the lvt network with Cu(II) complexes of structurally related 1,2-diazole ligands. RSC advances, 4(30), 15770. https://doi.org/10.1039/c4ra02147a

• Journal Article Type: Article
• Acceptance Date: Mar 23, 2014
• Online Publication Date: Mar 24, 2014
• Deposit Date: Jun 16, 2023
• Journal: RSC Advances
• Print ISSN: 2046-2069
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 4
• Issue: 30
• Pages: 15770
• DOI: https://doi.org/10.1039/c4ra02147a
• Keywords: General Chemical Engineering; General Chemistry
• Additional Information: : This document is CrossCheck deposited; : Supplementary Information; : Crystal Structure Data; : The Royal Society of Chemistry has an exclusive publication licence for this journal; : Received 12 March 2014; Accepted 23 March 2014; Accepted Manuscript published 24 March 2014; Version of Record published 27 March 2014