This website uses cookies to give you the best user experience. If you continue without changing your settings we'll assume you are happy to receive all RSC cookies. You can change your cookie settings by navigating to our Privacy and Cookies page and following the instructions. These instructions are also obtainable from the privacy link at the bottom of any RSC page.
Lite Version|Standard version
Home > Dalton Transactions >
To gain access to this content please
Log in via your home Institution.
Log in with your member or subscriber username and password.
Download


Buy PDF Add PDF to Basket (£42.50*)
*Exclusive of taxes
This article contains 6 page(s)
Abstract | Cited by

The reaction between MnBr2·4H2O with H3tmp (1,1,1-tris(hydroxymethyl)propane) in MeCN in the presence of Na(O2CCMe3) and NBu4Br produces the complex [Mn8(O2CCMe3)2(tmp)2(Htmp)4Br4(H2O)2]·2MeCN (1·2MeCN) in good yield. The centrosymmetric octanuclear molecule consists of four MnIII and four MnII ions assembled together by fourteen alkoxo bridges to give a [MnIII4MnII4(μ3-OR)6(μ2-OR)8]6+ rod-like core in which the metal centres are arranged in a planar zigzag fashion. Peripheral ligation is provided by a combination of bridging pivalate ions, terminal bromides and water molecules. Dc magnetic susceptibility measurements reveal the presence of dominant antiferromagnetic interactions leading to a spin ground state of S = 0. A rationalization of this result is attempted by structural comparison with previously reported tetranuclear manganese complexes containing the [MnIII2MnII2(μ3-OR)2(μ2-OR)4] core in which the magnetic interactions are ferromagnetic.

Graphical abstract: 1,1,1-Tris(hydroxymethyl)propane in manganese carboxylate chemistry: synthesis, structure and magnetic properties of a mixed-valence [MnIII4MnII4] cluster featuring the novel [MnIII4MnII4(μ3-OR)6(μ2-OR)8]6+ core

Page: ^ Top


Enter Keywords, author, title,reference, or DOI
Log in | Register