naming a chemical compound. I'm currently learning how to name alkanes and alkyl halides. Im confused about the compound ethanal, or acetaldehyde. The second carbon has a double bond on its hydrogen, so I'm wondering why the infix is "an" instead of "en". Frpm the table of infixes, it says "an" is for single bonds. Can someone help me understand

Organic Chemistry: A Guided Inquiry
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ChapterNW4: Nomenclature Worksheet 4: Carbonyl Compounds
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naming a chemical compound. I'm currently learning how to name alkanes and alkyl halides. Im confused about the compound ethanal, or acetaldehyde. The second carbon has a double bond on its hydrogen, so I'm wondering why the infix is "an" instead of "en". Frpm the table of infixes, it says "an" is for single bonds. Can someone help me understand

nyarocarpon tramework (or the iongest continuous carbon cnain). we must know the first tweive prerixes
listed in Table 4.
Table 4. IUPAC Prefixes for the Straight Chain Hydrocarbon Framework
Prefix
Number of C Atoms
Prefix
Number of C Atoms
meth
1.
hept
7
eth
2
oct
8
prop
9
non
but
dec
10
pent
5
undec
11
hex
6
dodec
12
The Infix
The infix indicates the presence of just single bonds, one or more double bonds or one or more triple
bonds. We must know these infixes listed in Table 5.
Table 5. IUPAC Infixes
Infix
Bonds
all single bonds
one or more double bonds
an
en
yn
one or more triple bonds
The Suffix
The suffix indicates the type or class of organic compounds. We should know the suffixes for the most
common types of organic compounds listed in Table 6.
Table 6. IUPAC Suffixes for Common Organic Compounds
Suffix
Class of Organic Compound
e
hydrocarbon (C and H only)
ol
alcohol (ROH)
al
aldehyde (RCHO)
amine
amine (RNH2)
one
ketone (RCOR1)
oic
carboxylic acid
Transcribed Image Text:nyarocarpon tramework (or the iongest continuous carbon cnain). we must know the first tweive prerixes listed in Table 4. Table 4. IUPAC Prefixes for the Straight Chain Hydrocarbon Framework Prefix Number of C Atoms Prefix Number of C Atoms meth 1. hept 7 eth 2 oct 8 prop 9 non but dec 10 pent 5 undec 11 hex 6 dodec 12 The Infix The infix indicates the presence of just single bonds, one or more double bonds or one or more triple bonds. We must know these infixes listed in Table 5. Table 5. IUPAC Infixes Infix Bonds all single bonds one or more double bonds an en yn one or more triple bonds The Suffix The suffix indicates the type or class of organic compounds. We should know the suffixes for the most common types of organic compounds listed in Table 6. Table 6. IUPAC Suffixes for Common Organic Compounds Suffix Class of Organic Compound e hydrocarbon (C and H only) ol alcohol (ROH) al aldehyde (RCHO) amine amine (RNH2) one ketone (RCOR1) oic carboxylic acid
aldehyde
2C
ethanal
or acetaldehyo
CH3 CHO
H H
H-C-C3D0
s aldehyde (IH atom)
Transcribed Image Text:aldehyde 2C ethanal or acetaldehyo CH3 CHO H H H-C-C3D0 s aldehyde (IH atom)
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