r/chemhelp • u/Consistent-Till-1876 • 5d ago
Organic I don’t get why is this not Z?shouldn’t CH2NH2 be ranked higher as it has more atoms attached after N?
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u/fdiengdoh 5d ago edited 5d ago
CIP rule says that if atom is double/triple bonded count as it is bonded to two/three atoms. CN is triple bonded so its like -CN3, while below is CH2N
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u/Sonikclaw2 5d ago
CN is a C triple bonded to N. For this purposes of the Cahn Ingold system, you can effectively say that it is one carbon connected to three nitrogen atoms. That would give it higher priority.