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Describe the structure of fullerenes. |
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Answer» Solution :(i) Fullerenes are NEWLY synthesised allotropes of carbon. (ii) Unlike graphite and diamond, these allotropes are discrete molecules such as `C_(32),C_(50),C_(60),C_(70),C_(76)` etc.. (iii) These molecules have cage LIKE structures. (iv) The `C_(60)` molecules have a soccer ball like structure and is called buckminster fullerene or buckyballs. (v) It has a fused ring structure consists of 20 six membered rings and 12 FIVE memebered rings. (vi) Each carbon atom is `SP^(2)` hybridised and forms three `sigma` bonds & a delocalised `pi` bond giving aromatic character to these molecules. (vii) The C-C bond distance is `1.44Å` and C = C distance `1.38Å`. |
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