With complements of the ligands: an unusual S-shaped [Mn7]2 assembly from tethered calixarenes

Marco Coletta, Sergio Sanz, Euan K. Brechin, Scott J. Dalgarno

Research output: Contribution to journalArticlepeer-review

Abstract

The reaction between MnCl2·4H2O, 2,2′-bis-p-tBu-calix[4]arene (H8L1) and 2-(hydroxymethyl)pyridine (hmpH) in a basic dmf/MeOH solution results in the formation of the complex [MnIII10MnII4(L1)3(hmp)4(μ3-O)4(μ3-OH)2(MeOH)4(dmf)6](dmf)4 (6) upon vapour diffusion of petroleum ether into the mother liquor. The crystals are in the monoclinic space group C2/c, with the asymmetric unit (ASU) comprising one half of the molecule. The structure describes a large S-shaped cluster (∼40 Å top to tail) where the unusual syn and anti conformations of the calixarene ligands results in two binding pockets each containing a [MnIII5MnII2] moiety comprised of two perpendicular, vertex-sharing [Mn4] butterflies. One butterfly possesses a [MnIII4O4] core and the second a [MnIII2MnII2O3] unit with the MnII ions in the central body positions. Magnetic susceptibility and magnetisation measurements reveal weak exchange interactions between the metal centres.
Original languageEnglish
JournalDalton Transactions
Early online date8 Jul 2020
DOIs
Publication statusE-pub ahead of print - 8 Jul 2020

Fingerprint

Dive into the research topics of 'With complements of the ligands: an unusual S-shaped [Mn7]2 assembly from tethered calixarenes'. Together they form a unique fingerprint.

Cite this