3.3 Aldehydes and Ketones
CHS
I
125
SHC - CH 2 - CH2 - CH- CH 2 - CHS Butane-l ,2,4-tricarbothioaldehyde
S
S
B
II
II
(XI ¥D9~CH2 Anthracene-l,9, 10{2H)-trithione
~
10
hC
5
II
4
S
Thioaldehydes and thioketones oxidized at sulfur are additively named as
thioaldehyde oxides, dioxides and thioketone oxides, dioxides, respectively. Besides, the traditional names sulfine and sulfene are still used for
these species.
Thiobenzaldehyde oxide (Phenylsulfine)
Heptane-3-thione dioxide (Ethyl butyl sulfene)
Acetals and ketals as well as ortho esters can either be straightforwardly
designated as derivatives of the underlying carbonyl compounds or
named substitutively as ... oxy ... derivatives of the most senior parent
structure actually present. Hemiacetals are treated as substituted alcohols.
Cyclohexa-2,S-dien -I-one ethyl methyl ketal
or:
3-Ethoxy-3-methoxycyclohexa -1,4-diene
F \ /OH
H 2 C
C,
1-{Pentyloxy)cyclohexa-2,S-dien-l-ol
"=I OC5H11
trad.: Malonaldehyde tetrabutyl acetal
subst.: Propane-I, 1,3,3-tetrayltetrakis{ oxy)tetrakisbutane (CA: ... 1 ,3-diylidentetrakis ... )
Cyclic acetals can most simply be named as heterocycles. The
H2C;:O:::grouping is traditionally also treated as methylenedioxy sub°
stituent group.