Bonding Set I Page 3
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1
2
3ClF
is a modified trigonal bipyramid; the two unshared pairs go in equatorial positions leaving the T
3
shape.
+
⎡
⎤
••
••
••
4. (a)
(i)
⎢
⎥
:F
:S :
F:
••
••
••
⎢
⎥
:F:
⎢
⎥
••
⎣
⎦
3
(ii) sp
.
(iii) pyramidal
(iv) smaller than 109.50˚. The lone pair of unbonded electrons occupies more space than the bonded
pairs and, therefore, pushed the bonded pairs away and hence, a smaller bond angle than a
perfect tetrahedron.
(b) (i)
3
2
(ii) sp
d
(iii) square pyrimidal
(iv) S = +4
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