Xue Wang
Molybdocalix[4]arene N,O-Schiff-base ligands
Wang, Xue; Zhao, Ke Qing; Elsegood, Mark R.J.; Redshaw, Carl
Authors
Ke Qing Zhao
Mark R.J. Elsegood
Professor Carl Redshaw C.Redshaw@hull.ac.uk
Professor of Inorganic Materials Chemistry and REF Lead for Chemistry
Abstract
The ‘one-pot’ reaction of 2-hydroxy-3,5-di-tert-butylsalicylaldehyde with in situ generated ‘amino calixarene’ (from {Mo[(2-NC 6 H 4 ) 2 CH 2 CH 2 ]Cl 2 (DME)}, KOtBu and p-tert-butylcalix[4]areneH 4 LH 4 ) afforded, after work-up, the heterobimetallic salt K(NCMe) 2 [Mo(NCMe)(OEt)(2-C 6 H 4 CH 2 CH 2 C 6 H 4 NH 2 -2)L] (1∙2MeCN). By constrast, use of the ‘amino calixarene’ [Mo(NCMe)(2-C 6 H 4 CH 2 CH 2 C 6 H 4 NH 2 -2)L] afforded the potassium/ethoxide-free complex [Mo(NCMe)(2-C 6 H 4 CH 2 CH 2 C 6 H 4 N-2-CHC 6 H 2 -2′-(OH)-3′,5′-tBu)L] (2∙2MeCN). Reaction of the ‘amino calixarene’ (two equivalents) with the dialdehyde [1,3-(CHO) 2 -5-MeC 6 H 3 OH-2] led, following work-up, to the isolation of the cation-anion pair [C 46 H 42 N 4 O 2 ] 2+ [Mo 6 O 19 ] 2− ·C 2 H 3 N (3∙MeCN). The molecular structures of 1·2MeCN, 2·2MeCN and 3·MeCN are reported, for which it was necessary to use synchrotron radiation for data collection. Complex 1 contains an eliptical calixarene conformation as a result of π-interactions between the K + and the arene groups and a distorted O 5 N octahedral geometry at the molybdenum centre, whereas in ‘K + /ethoxide-free’ 2, the calixarene retains the cone conformation and the metal possesses a distorted octahedral O 4 N 2 coordination environment. In 3, a protonated macrocyclic cation, formed via hydrolysis, has weak intermolecular interactions with the polyoxomolybdate anion.
Citation
Wang, X., Zhao, K. Q., Elsegood, M. R., & Redshaw, C. (2018). Molybdocalix[4]arene N,O-Schiff-base ligands. Supramolecular chemistry, 30(5-6), 404-410. https://doi.org/10.1080/10610278.2017.1403608
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 6, 2017 |
Online Publication Date | Nov 27, 2017 |
Publication Date | 2018 |
Deposit Date | Nov 15, 2017 |
Publicly Available Date | Mar 28, 2024 |
Journal | Supramolecular Chemistry |
Print ISSN | 1061-0278 |
Electronic ISSN | 1029-0478 |
Publisher | Taylor and Francis |
Peer Reviewed | Peer Reviewed |
Volume | 30 |
Issue | 5-6 |
Pages | 404-410 |
DOI | https://doi.org/10.1080/10610278.2017.1403608 |
Keywords | Molybdenum; Calixarene; Schiff base; Molecular structures |
Public URL | https://hull-repository.worktribe.com/output/456508 |
Publisher URL | http://www.tandfonline.com/doi/full/10.1080/10610278.2017.1403608 |
Additional Information | Peer Review Statement: The publishing and review policy for this title is described in its Aims & Scope.; Aim & Scope: http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=gsch20 |
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