2,2-Dialkyl-2H-benzimidazoles, the high energy tautomers of the corresponding 1,2-dialkyl-1H-benzimidazoles. Syntheses and their complexes with Cu(I) and Ag(I)
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Creator |
Patra, Goutam K
Goldberg, Israel Drew, Michael G B De, Senjuti Naskar, Jnan P Datta, Dipankar |
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| Date |
2008-10-10T11:05:59Z
2008-10-10T11:05:59Z 2007-11 |
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| Identifier |
0376-4710
http://hdl.handle.net/123456789/2190 |
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| Description |
1758-1762
Reaction of Cu(1,2-phenylenediamine)₂ (ClO₄)₂ with neat RR'=O (R = methyl and/or ethyl) gives Cu(2,2-dialkyl-2H-benzimidazole)ClO₄, demetallation of which by the action of aqueous ammonia yields pure 2,2-dialkyl-2H-benzimidazoles. These are characterised by NMR. In the X-ray crystal structure, Ag(2,2-methyl-2H-benzimi-dazole)NO₃ is found to be a spiral 1D coordination polymer where the 2H-benzimidazole acts as an N,N bridge between two Ag(I) centers. Although 2H-benzimidazoles are very unstable in the free state, they are quite stable in their Cu(I) and Ag(I) complexes. The 1,2-tautomerisation in imidazole and benzimidazole have been studied by means of transition state calculations at B3LYP/6-311+G(2d,p)* level. |
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| Language |
en_US
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| Publisher |
CSIR
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| Source |
IJCA Vol.46A(11) [November 2007]
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| Title |
2,2-Dialkyl-2H-benzimidazoles, the high energy tautomers of the corresponding 1,2-dialkyl-1H-benzimidazoles. Syntheses and their complexes with Cu(I) and Ag(I)
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| Type |
Article
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