An improved protocol for the synthesis of antipodal β-tetrabromo-tetraphenylporphyrin and the crystal structure of its Zn(II) complex
✍ Scribed by P.K. Kumar; P. Bhyrappa; B. Varghese
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- French
- Weight
- 87 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
This work reports an improved protocol for the regioselective synthesis of 2,3,12,13-tetrabromo-5,10,15,20-tetraphenylporphyrin (H 2 TPPBr 4 ) and the crystal structure of its Zn(II) complex which shows saddle shaped geometry.
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Bromination of meso-tetraphenylporphyrin, H 2 TPP with controlled amounts of N-bromosuccinimide at ambient conditions in CHCl 3 produced b-dibromo and tribromotetraphenylporphyrins. The regiochemistry of the ZnTPPR 3 (R = Br, Ph) complexes indicate the antipodal substitution at the b-pyrrole positio
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