CHEM 109C Midterm: Chem 109C Exam 1
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Section i. (50 points total: give a systematic name (4 points each; 20 pts total) 1-methyl-2-propylcyclopentane: draw lewis (electron dot) structure for methanol. Determine formal charge for each atom. (5 pts) (must specify 1 ) Q(o) = 6 (4 + 0. 5*4) = 0; Every atom has formal charge of zero: what atomic orbitals overlap to form the ch bonds in cyclopentane? (4 points) sp3 hybridized atomic orbital of carbon overlaps with the s atomic orbital of hydrogen, 2-bromopropane, ethane, 1-fluoropropane, propane. B < d < c < a: rank the following molecules in the order of increasing dipole moments and briefly explain your reasoning (5 points). Ethane (in staggered conformation) has a center of symmetry and all small c-h dipoles cancel perfectly. = 0. 00 debye (3 pts for order, 2 pts for explanation) , does not have a center of symmetry and thus has a small dipole moment. , has a very polar c-f bond because fluorine is more.
