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CHEM 2131 - EXAM 1
02126/2021
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Problem 1 Problem 2
Problem 3
Problem 4
Problem 5
EXTRA CREDIT
TOTAL
    1     Basics
a) Give an example for a Lewis acid-base reaction, relying on an example that does employ a Lewis acid that is NOT a Bronsted acid. Use curved the arrow depiction to complement your chemical equation.
b) DMSO (1) and acetone (2) are used frequently as solvents in organic chemistry.
They appear to be very similar, yet their structures are quite different. Predict (i.e., draw) their correct 3D structures and determine the hybridization on each atom center.
    0    C)
I-IBC
c) What is the formal energy cost to "rotate" a double bond? Demonstrate the rotation in an orbital image scheme!
Problem 2     points]    Nomenclature
a) Give the IUPAC names for the depicted compounds
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b) The given names below are incorrect. Give the correct name for each of these compounds:
· 2-methyl-3-tert.-butylpentane
        2-methyl-3-isopropyl-4-chloropentane
· trans-I -pentyl-3-neopentyl-cyclobutane
    3     - (Cyclo)alkanes + Conformational Analysis I
a) Depict an energy diagram that correlates ring strain with ring size. Clearly mark the different categories of rings discussed in class and for each category mark the most...