CHEM 1300 Lecture Notes - Lecture 16: Intermolecular Force, Isomer, Trigonal Planar Molecular Geometry
26 Jun 2018
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Lecture 16 Nomenclature
●Helps to eliminate ambiguity
●Helps to identify placement of double bonds, triple bonds and substituents
●Rings prefix: Cyclo
oSuffix: Ane, Ene, Yne depending on single double triple bonds
oIf there is no number prefix infront of the double bond placement assume mono
oNote: if parent chain has more than 6 carbons, the benzene ring will be a phenyl
substituent group ending in yl
●O, M, P substituents
o“Ortho”, “Meta”, “Para”
oOrtho: side by side
oMeta: one space in the middle
oPara: opposite side (parallel)
●Halide suffix “o” (Chloro)
●Substituents end in “yl” (any branch from the parent chain)
●Check list for naming:
oHave you got the parent chain#? Is it the longest one?
oDo you have the type and # of substituents?
oAre the substituents on the smallest # carbon? Is it in the proper direction?
oCheck your suffix for double/triple bonding
oAlphabetical Order for naming?
Parent Chain Prefix’s
1. Meth
2. Eth
3. Prop
4. But
5. Pent
6. Hex
7. Hept
8. Oct
9. Non
10. Dec
Substituent Branch Prefix’s
1. Mono
2. Di
3. Tri/tert
4. Tetra
5. Penta
6. Hexa
7. Hetpa
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