Answer 8 D-isomers of fructose, as I figured out.
Of the D-keto-hexoses (like fructose) there are :
8x D-2-ketoses: alpha and beta form of 4 members [D-psicose, D-fructose, D-sorbose, D-tagatose]
Not: D-3-ketoses can NOT form furanose ring (4C + O)
Not: D-4-ketoses = same as D-3-ketose
Not: D-5-ketoses = D-2-ketose
At last you can also mention the same set of the (full) enantiomers in L-form:
8x L-2-ketoses: alpha and beta form of [L-psicose, L-fructose, L-sorbose, L-tagatose]
Three isomers of C2HfClBr are possible.
Diacetylferrocene can have three possible isomers: symmetrical cis-diacetylferrocene, symmetrical trans-diacetylferrocene, and unsymmetrical diacetylferrocene.
There are a total of 16 possible isomers of a D-ketohexofuranose. This includes aldohexose isomers as well as ketohexose isomers. The structural diversity arises from variations in the arrangement of hydroxyl (-OH) groups and the position of the carbonyl group.
There are three cyclic isomers possible for the formula C3H6O: two variations of oxirane and one of cyclopropanol. There are two acyclic isomers: propanal and 2-propanol.
4
There are four possible functional isomers for tetrose sugars. They include erythrose, threose, erythrulose, and threulose. Each of these isomers has a unique arrangement of functional groups that determine its chemical properties and biological functions.
There are two types of geometric isomers possible in octahedral complex ions: cis and trans isomers. For a complex with six different ligands, there can be a maximum of 30 different cis and trans isomers.
1,2-dichloropropane exists as an optical isomer.
Pentane has three isomers: n-pentane, isopentane, and neopentane. Isomers are molecules that have the same molecular formula but different structural arrangements. In the case of pentane, these isomers differ in the way the carbon atoms are connected to each other.
Three
Three other positional isomers are possible,, 1,2 - 1,3 and 1,4 bromochloro isomers.
it may be chlorophyl , green matter of plants....but there are so many other isomers possible....