# Homework Solution: owin a dipole Which of the following molecules has a dipole moment? Indicate the…   owin a dipole Which of the following molecules has a dipole moment? Indicate the expected direction of each. 2.26 OH (e) HO OH (d) OH (b) HO OH nine and the pos- tructures 2.31 Calculate the formal charges on the ato (b) H2C-NEN (el HC (a) (CHa)zöBF (f) (e) CH3 (d) d =0-0 : H2C-p-CH3 CH3   owin a dipole Which of the forthcoming molecules has a dipole instant? Indicate the expected order of each. 2.26 OH (e) HO OH (d) OH (b) HO OH nine and the pos- tructures 2.31 Calculate the complete reckoning on the ato (b) H2C-NEN (el HC (a) (CHa)zöBF (f) (e) CH3 (d) d =0-0 : H2C-p-CH3 CH3

## Expert Response

2.31

we recognize complete inculpate = collocation sum – 1/2(sum of bonding electrons) – (sum of desert span electrons)

a.

Complete inculpate of O in (CH3)2OBF3 = 6 – 1/2 (6) – (2) = +1

F.C of B = 3 – 1/2 (8) – 0 = -1

b.

F.C of C = 4-1/2 (6) – 2 = -1

complete inculpate of average nitrogen = 5 – 1/2 (8) – 0 = +1

complete inculpate of ultimate nitrogen = 5 – 1/2(6) – 2 = 0

c.

F.C of carbon = 4 – 1/2 (8) -0 = 0

F.C of average nitrogen = 5 – 1/2 (8) – 0 = +1

F.C of ultimate nitrogen = 5 – 1/2(4) – 4 = -1