Tetraethylammonium [12,12-diethyl-2,2,9,9-tetramethyl-1,4,7,10-tetraza-5,6-benzotridecane-3,8,11,13-tetraone(4−)]oxidomanganate(V)

✍ Scribed by Berggren, Gustav ;Kaynak, Filiz Betul ;Anderlund, Magnus F. ;Eriksson, Lars ;Åkermark, Björn

• Publisher: International Union of Crystallography
• Year: 2007
• Tongue: English
• Weight: 1001 KB
• Volume: 63
• Category: Article
• ISSN: 1600-5368
• DOI: 10.1107/s1600536807047691

✦ Synopsis

The Mn^V^ complex in the title compound, (C~8~H~20~N)[Mn(C~21~H~26~N~4~O~4~)O], is interesting as it has been suggested that Mn^V^ oxospecies are intermediates both in epoxidation of alkenes and in water oxidation in PSII, i.e. photosystem II, the protein found in oxygenic photosynthetic organisms, which uses light to split water into O~2~, protons and electrons. The Mn atom has a square-pyramidal coordination of four N atoms with an apical O atom. The four N atoms coordinating to Mn [Mn—N = 1.872 (2)–1.882 (2) Å] form a plane within 0.03 (3) Å from which the Mn ion is displaced by 0.582 (2) Å.