Browse by author
Lookup NU author(s): Professor William Clegg, Dr Luca Russo
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
With the aim of introducing the diisopropylamide [NiPr2](-) ligand to alkali-metal-mediated manganation (AMMMn) chemistry, the temperature-dependent react ions of a 1:13 mixture of butylsodium, bis(trimethyl-silylmethyl)manganese(II), and diisopropylamine with ferrocene in hexane/toluene have been investigated. Performed at reflux temperature, the reaction affords the surprising. ferrocenefree, hydrido product [Na2Mn2 (mu-H)(2){N(iPr)(2)}(4)]center dot 2 toluene (1), the first Mn hydrido inverse crown complex. Repeating the reaction rationally, excluding ferrocene, produces 1 in in isolated crystalline yield of 62%. At lower temperatures, the same bimetallic amide mixture leads to the manganation of ferrocene to generate the first trimanganese, trinuclear ferrocenophane, [{Fe(C5H4)(2)}(3){Mn3Na2(NiPr2)(2) (HNiPr2)(2)}] (2) in an isolated crystalline yield of 81%. Both 1and 2 have been characterised by X-ray crystallo-graphic studies. The magnetic properties of paramagnetic 1 and 2 have also been examined by variable-temperature magnetisation measurements on powdered samples. For 1, the room-temperature value for chi T is 3.45cm(3)K mol(-1), and on lowering the temperature a strong antiferromagnetic coupling between the two Mn ions is observed. For 2, the room-temperature value for chi T is 4.06 cm(3) Kmol(-1), which is significantly lower than the expected value for three isolated paramagnetic Mn-II ions.
Author(s): Blair VL, Carrella LM, Clegg W, Klett J, Mulvey RE, Rentschler E, Russo L
Publication type: Article
Publication status: Published
Journal: Chemistry: A European Journal
Year: 2009
Volume: 15
Issue: 4
Pages: 856-863
ISSN (print): 0947-6539
ISSN (electronic): 1521-3765
Publisher: Wiley - VCH Verlag GmbH & Co. KGaA
URL: http://dx.doi.org/10.1002/chem.200802086
DOI: 10.1002/chem.200802086
Altmetrics provided by Altmetric