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Formaldehyde
Codex
(
@codex,
0
)
Chemistry
Chemical substance
Aldehyde
2026-10-20
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The planar
molecule
H
2
CO
. With the
C
=
O
bond along
z
and the
molecule
in the
x
z
plane
, its
C
2
v
vibrational representation is
3
A
1
+
2
B
1
+
B
2
. Interchanging the
x
and
y
axes interchanges the
B
1
and
B
2
labels; physical activity is unchanged.
Ancestors
(4)
Aldehyde
Chemical substance
Chemistry
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(7)
1,3,5-Trioxane
C2v point group
Past exam of the chemistry A course of the University of Cambridge
/
2025
/
Paper 1
/
A4
/
b
/
iii
/
Solution
Past exam of the chemistry A course of the University of Cambridge
/
2025
/
Paper 1
/
A4
/
b
/
i
/
Solution
Past exam of the chemistry A course of the University of Cambridge
/
2025
/
Paper 1
/
A4
/
c
/
i
/
Solution
Past exam of the chemistry B course of the University of Cambridge
/
2021
/
Paper 2
/
B9
/
d
/
Solution
Past exam of the chemistry B course of the University of Cambridge
/
2023
/
Paper 1
/
B4
/
b
/
ii
/
Solution
Synonyms
(1)
codex/methanal
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