Isomerism

Question 1

define: isomer

Answer 1

different compounds with the same structural formula

Question 2

flow chart?

Answer 2

constitutional isomer
stereoisomer
-enantiomer
-diastereomer
-meso compounds
cis/trans, e/z

Question 3

define: constitutional isomer

Answer 3

same mf but different sf, due to different kinds of bonds and/or connectivity.

Question 4

define: stereoisomer

Answer 4

molecules with same mf and connectivity, however atoms have a different orientation in space that cant be interconverted by rotation around a single bond.

Question 5

define: chiral molecule

Answer 5

molecules that are non superimposable mirror images and have atleast one stereocentre

Question 6

define: stereocentre

Answer 6

one carbon atom attached to 4 different groups

Question 7

maximum number of stereoisomers for n stereocentres?

Answer 7

2^n (note: can be less due to meso compounds)

Question 8

define: enantiomer, diastereomer, meso compound

Answer 8

enantiomer: pair of chiral molecules that are non superimposable mirror images
diastereomer: non superimposable non mirror images
meso compound: stereoisomer contains internal plane of symmetry so

Question 9

assigning R and S config?

Answer 9

make lowest priority point away
double the double bonds
assign priorities
R -> S