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Rhenium(i) tricarbonyl complex of 5,20-bis(p-tolyl)-10,15-bis(p-methoxyphenyl)-21-selenaporphyrin: first X-ray structural characterization of metal complex of 21-selenaporphyrin.
MedLine Citation:
PMID:  23774846     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Synthesis and first structural characterization of hexa coordinated rhenium(i) tricarbonyl complex of 5,20-bis(p-tolyl)-10,15-bis(p-methoxyphenyl)-21-selenaporphyrin are described. The Re(i) complex of 21-selenaporphyrin was synthesized by treating free base 21-selenaporphyrin in 1,2-dichlorobenzene with Re(CO)5Cl at reflux for 7 h and analyzed using mass, NMR, FT-IR, UV-vis and electrochemical techniques. The first structure of metal complex of 21-selenaporphyrin was determined by X-ray single crystal analysis. The crystal structure revealed that the Re(CO)3 coordinates to two of the three inner nitrogens and one selenium to produce compound . The selenophene ring bent towards the Re(i) ion and the selenium is displaced by 0.41 Å from the mean plane of 24-atoms to coordinate with Re(i) ion in η(1)-fashion. The 21-selenaporphyrin is distorted in compound compared to free base 21-selenaporphyrin. (1)H and (13)C NMR studies indicated that compound exhibits fluxional behaviour in coordination mode of binding in solution. The compound is highly stable and does not undergo decomplexation under acidic conditions. The absorption spectra showed three broad Q-bands and splitted Soret band and electrochemical studies indicated that compound is stable under redox conditions.
Authors:
Avijit Ghosh; Rajesh Gonnade; Mangalampalli Ravikanth
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-6-18
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2013 Jun 
Date Detail:
Created Date:  2013-6-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Chemistry, Indian Institute of Technology, Bombay, Powai, Mumbai 400 076, India. ravikanth@chem.iitb.ac.in.
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