1.7 Drawing Organic Structures Problem 1.19 Determine the geometry around all se
ID: 563920 • Letter: 1
Question
1.7 Drawing Organic Structures Problem 1.19 Determine the geometry around all second-row elements in each compound. Problem 1.20 Predict the indicated bond angles in each compound. b. CH-CCl Problem 1.21 Using the principles of VSEPR theory, you can predict the geometry around any atom in any molecule, no matter how complex. Enanthotoxin is a poisonous compound isolated from a common variety of hemlock grown in England. Predict the geometry around the indicated in enanthotoxin. -c-C-C-C-c HO-C-C C-C H..C-Czc-coYfH H H HHHExplanation / Answer
19.
(a) CH3-CO-CH3
According to VSEPR theory, number of electron pairs around central atoms = number of hybrid orbitals.
While counting electron pairs include lone pairs and treat multiple bonds as eingle electron pair.
therefor,
In the given compound acetone,
From left to right,
C1 = sp3 (tetrahedral - all are bond pairs)
C2 = sp2 (trigonal planar because of 3 bond pairs)
O = sp2 ( Linear because among 3 e.p , 2 are lone pairs and only 1 is bond pair)
C3 = sp3 - Tetrahedral ( All e.p are bondpairs)
(b)
CH3 - O - CH3
From left to rigth,
C1 = sp3 - tetrahedral
O = sp3 - angular
C2 = sp3 - tetrahedral
(c)
NH2-
N = sp3 - angular
(d)
CH3-CN
from left to rigth
C1 = sp3 - tetrahedral
C2 = sp - linear
N = sp - linear
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