An unknown compound (A) has a formula of C3H12. Treatment of A with H,/Pd- carbon gives B (CgH16). Treatment of A with H2 on a Lindlar catalyst gives no reaction Ozonolysis of A followed by workup with Zn, HOAc affords 2,4-pentanedione and propanedial shown below. H2 / Pd on carbon A в C'3H12 C3H16 H2 / Lindlar's cat. no rxn 1) O3 2) Zn, HOAC H. H a) How many double bonds does A have? b) How many triple bonds does A have? c) How many rings does A have? d) Propose structures for both A and B that are consistent with these data.

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An unknown compound (A) has a formula of C3H12. Treatment of A with H,/Pd-
carbon gives B (C3H16). Treatment of A with H2 on a Lindlar catalyst gives no reaction.
Ozonolysis of A followed by workup with Zn, HOAc affords 2,4-pentanedione and
propanedial shown below.
H2 / Pd on carbon
A
в
C'3H12
C3H16
H2 / Lindlar's cat.
no rxn
1) O3
2) Zn, HOAC
H
H
a) How many double bonds does A have?
b) How many triple bonds does A have?
c) How many rings does A have?
d) Propose structures for both A and B that are consistent with these data.
Transcribed Image Text:An unknown compound (A) has a formula of C3H12. Treatment of A with H,/Pd- carbon gives B (C3H16). Treatment of A with H2 on a Lindlar catalyst gives no reaction. Ozonolysis of A followed by workup with Zn, HOAc affords 2,4-pentanedione and propanedial shown below. H2 / Pd on carbon A в C'3H12 C3H16 H2 / Lindlar's cat. no rxn 1) O3 2) Zn, HOAC H H a) How many double bonds does A have? b) How many triple bonds does A have? c) How many rings does A have? d) Propose structures for both A and B that are consistent with these data.
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