Synthesis of selenium bridged metallacycles via oxidative addition of diaryl diselenide across Re-Re bond: Novel one-pot reaction approach
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Title |
Synthesis of selenium bridged metallacycles via oxidative addition of diaryl diselenide across Re-Re bond: Novel one-pot reaction approach
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Creator |
VANITHA, A
MOBIN, SM MANIMARAN, B |
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Subject |
PI-PI STACKING
MOLECULAR RECTANGLES CRYSTAL-STRUCTURES COORDINATION CHEMISTRY DIPHENYL DISELENIDE CATALYTIC-ACTIVITY BUILDING-BLOCKS HYDROGEN-BONDS COMPLEXES RHENIUM Rhenium carbonyl Diaryl diselenide Pyridine ligands Oxidative addition Molecular recognition Metallacycles |
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Description |
One-pot synthesis of novel M(2)E(2)L(2) type metallacycles [L(CO)(3)Re(mu-SeR)(2)Re(CO)(3)L] (1-5) was accomplished by oxidative addition of diaryl diselenide to low-valent transition metal carbonyl with monodentate pyridine ligands. In metallacycles 1-5, where L pyridine ligand, R = C(6)H(5), CH(2)C(6)H(5), the pyridyl groups bonded to metal centres invariably adopted cis conformation due to pi-pi interaction whereas, in compounds 1a and 2a, the pyridyl ligands were oriented in trans conformation. When bulky phenyl groups are introduced at para position of pyridyl rings, as in case of metallacycle 3, the steric hindrance disrupts the soft interaction and resulted into the expansion of space in between two phenylpyridyl groups and created a void. The Metallacycles 1-5 have been characterised by elemental analysis, NMR, IR, absorption and emission spectroscopic techniques. Molecular structures of 1, 1a, 2, 2a, 3 and 4 were determined by single crystal X-ray diffraction analysis and the structural studies of 1, 2, 3 and 4 revealed that the pyridyl groups attached to the metal centres exhibited cis conformation, while 1a, 2a displayed trans conformation. (C) 2011 Elsevier B. V. All rights reserved.
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Publisher |
ELSEVIER SCIENCE SA
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Date |
2012-01-20T10:08:44Z
2012-01-20T10:08:44Z 2011 |
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Type |
Article
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Identifier |
JOURNAL OF ORGANOMETALLIC CHEMISTRY,696(8)1609-1617
0022-328X http://dx.doi.org/10.1016/j.jorganchem.2011.01.026 http://dspace.library.iitb.ac.in/jspui/handle/100/13821 |
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Language |
English
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