Toward synthetic models for high oxidation state forms of the photosystem II active site metal cluster: the first tetranuclear manganese cluster containing a [Mn4(mu-O)5]6+ core.
The first tetrameric high valent manganese complex consisting of a MnIV4(mu-O)5 bridged core, [Mn4(mu-O)5(dmb)4(dmbO)2](ClO4)4, [symbol: see text] was isolated via dimanganese (III,IV) and (IV,IV) intermediates in presence of the oxidant tert-butyl hydroperoxide and was characterized by X-ray crystallography, electrochemistry, infrared, UV-visible, 1H NMR, and mass spectroscopy; the structure found differs greatly from a proposal for the putative Mn4O5 aggregate found in Photosystem II.
Department of Chemistry, Eugene F. Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, MA 02467-3860, USA.
Sumitra
S
Mukhopadhyay
Richard J
RJ
Staples
William H
WH
Armstrong
D001665:Binding Sites; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D009682:Magnetic Resonance Spectroscopy; D008345:Manganese / Q000737:chemistry*; D013058:Mass Spectrometry; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D016877:Oxidants / Q000378:metabolism*; D010100:Oxygen / Q000737:chemistry; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry* / Q000378:metabolism; D045332:Photosystem II Protein Complex; D013056:Spectrophotometry, Ultraviolet; D020122:tert-Butylhydroperoxide / Q000378:metabolism
D009942:Organometallic Compounds; D016877:Oxidants; D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex; D008345:Manganese; D020122:tert-Butylhydroperoxide; D010100:Oxygen