Chamber's Encyclopaedia, Volume 3International Learnings Systems, 1967 |
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Page 84
... atoms , i.e. atoms to which are attached four different atoms or groups . In the aldohexose formula ( fig . 1 , A ) it is seen that carbon atoms 2 , 3 , 4 and 5 are asymmetric in this sense and , according to the rule of van't Hoff ...
... atoms , i.e. atoms to which are attached four different atoms or groups . In the aldohexose formula ( fig . 1 , A ) it is seen that carbon atoms 2 , 3 , 4 and 5 are asymmetric in this sense and , according to the rule of van't Hoff ...
Page 339
... atoms in combination ( e.g. NH ,, NI , and PH ,, PC13 ) Kekulé ( 1857-58 ) showed that carbon is quadri- valent since the carbon atom combines with or re- places four atoms of hydrogen . This was also assumed independently by Archibald ...
... atoms in combination ( e.g. NH ,, NI , and PH ,, PC13 ) Kekulé ( 1857-58 ) showed that carbon is quadri- valent since the carbon atom combines with or re- places four atoms of hydrogen . This was also assumed independently by Archibald ...
Page 353
... atoms may be attached to one or more of the ring- atoms . The structural variety and complexity of organic compounds become intelligible in the light of these considerations : C C A homocyclic ring A heterocyclic ring C C compounds of ...
... atoms may be attached to one or more of the ring- atoms . The structural variety and complexity of organic compounds become intelligible in the light of these considerations : C C A homocyclic ring A heterocyclic ring C C compounds of ...
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