how many isomers of dimethylcyclobutane are there?

Answer 1

I come up with five possible **stereoisomers**:

Three basic isomers, as listed by schmiso:
1,1-dimethylcyclobutane
1,2-dimethylcyclobutane
1,3-dimethylcyclobutane

However, because the cyclobutane ring is rigid, you can have stereoisomers based on whether the two methyl groups are on the same side of the plane of the ring (cis-), or on opposite sides (trans-), just like you could have cis- or trans- 1,2-dichloroethene. So, the 1,2- and 1,3- forms of dimethylcyclobutane could be either cis- or trans -, giving each of them two stereoisomers, for a total of five:

1,1-dimethylcyclobutane
cis-1,2-dimethylcyclobutane
trans-1,2-dimethylcyclobutane
cis-1,3-dimethylcyclobutane
trans-1,3-dimethylcyclobutane

Answer 2

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RE:
how many isomers of dimethylcyclobutane are there?

Answer 3

Three

Cyclobutane is a ring with four atoms. There are three possible arrangements for the two methyl groups. One is if the methyl groups are bonded to same atom at the ring. If not the groups can be bonded to two adjacent atoms or not.

Hence you have three isomers:
1,1 dimethyl cyclobutane
1,2 dimethyl cyclobutane
1,3 dimethyl cyclobutane

Answer 4

Ok, so 1,2-dimethylcyclobutane is the systematic name for a carbon compound. So "di" meaning "two". Methyl = CH3 - R (connected to "R" group or a substituent) Cyclobutane = CH3CH2CH2CH2 --> 4 Carbons Which yeilds the shape of a square, and also the parent hydrocarbon (longest possible chain of carbons). So attaching your first isomer on the first end of the square, position "1" you add a CH3. Do the same thing for position "2". Therefore there are only 2 Isomers. An Isomer is when two CH3 are connected to 1 Carbon. Ah crap, nevermind. I forgot this stuff. I need to study.

Answer 5

Dimethylcyclobutane