The molecule with See-saw shape is

$$\begin{gathered} \mathrm{Number} \mathrm{of} \mathrm{electron} \mathrm{pairs}\mathbf{\left(}\mathbf{EP}\mathbf{\right)}=\frac{\mathrm{V}+\mathrm{M}-\mathrm{C}+\mathrm{A}}{2}; \\ \mathrm{V}=\mathrm{Group} \mathrm{number} \mathrm{of} \mathrm{central} \mathrm{atom}; \\ \mathrm{M}=-\mathrm{H}, -\mathrm{X}, -\mathrm{OH}....\mathrm{monovalent} \mathrm{groups} \mathrm{attached} \mathrm{to} \mathrm{central} \mathrm{atom} ; \\ \mathrm{C}=\mathrm{Charge} \mathrm{of} \mathrm{cation} ; \\ \mathrm{A}=\mathrm{Charge} \mathrm{of} \mathrm{anion} ; \\ \mathrm{V}=\mathbf{5}\mathbf{,}\mathbf{6}\mathbf{,}\mathbf{7}\mathbf{,}\mathbf{8} \mathrm{respectively} \mathrm{for} {15}^{\mathrm{th}}, {16}^{\mathrm{th}}, {17}^{\mathrm{th}}, {18}^{\mathrm{th}} \mathrm{group} \mathrm{elements} ; \\ \mathrm{Number} \mathrm{bond} \mathrm{pairs}, \mathbf{BP}(\mathrm{according} \mathrm{to} \mathrm{VSEPR} \mathrm{theory})=\mathrm{Number} \mathrm{of} \mathrm{atoms} \mathrm{directly} \mathrm{attached} \mathrm{to} \mathrm{central} \mathrm{atom}; \\ =\mathbf{5}\mathbf{,}\mathbf{4}\mathbf{,}\mathbf{3}\mathbf{,}\mathbf{2}\mathbf{ }\mathbf{respectively}\mathbf{ }\mathbf{in}\mathbf{ }{\mathbf{PCl}}_{\mathbf{5}}\mathbf{,}\mathbf{ }{\mathbf{SF}}_{\mathbf{4}}\mathbf{,}\mathbf{ }{\mathbf{ClF}}_{\mathbf{3}}\mathbf{,}\mathbf{ }{\mathbf{XeF}}_{\mathbf{2}}\mathbf{ }\mathbf{;} \\ \mathrm{Number} \mathrm{lone} \mathrm{pairs} \mathrm{on} \mathrm{central} \mathrm{atom}\mathbf{\left(}\mathbf{LP}\mathbf{\right)}=\mathbf{EP}\mathbf{-}\mathbf{BP}\mathbf{ }\mathbf{;}\mathbf{ } \\ =\mathbf{0}\mathbf{,}\mathbf{1}\mathbf{,}\mathbf{2}\mathbf{,}\mathbf{3}\mathbf{ }\mathbf{respectively}\mathbf{ }\mathbf{in} {\mathbf{PCl}}_{\mathbf{5}}\mathbf{,}\mathbf{ }{\mathbf{SF}}_{\mathbf{4}}\mathbf{,}\mathbf{ }{\mathbf{ClF}}_{\mathbf{3}}\mathbf{,}\mathbf{ }{\mathbf{XeF}}_{\mathbf{2}}\mathbf{;} \\ {\mathbf{PCl}}_{\mathbf{5}}\mathbf{-}\mathbf{\text{'}}\mathbf{5}\mathbf{\text{'}}\mathbf{ }\mathbf{bp}\mathbf{ }\mathbf{+}\mathbf{\text{'}}\mathbf{0}\mathbf{\text{'}}\mathbf{ }\mathbf{lp}\mathbf{ }\mathbf{;}\mathbf{ }{\mathbf{sp}}^{\mathbf{3}}\mathbf{d}\mathbf{-}\mathbf{Trigonal}\mathbf{ }\mathbf{bipyramidal}\mathbf{ }\mathbf{;} \\ {\mathbf{SF}}_{\mathbf{4}}\mathbf{-}\mathbf{\text{'}}\mathbf{4}\mathbf{\text{'}}\mathbf{ }\mathbf{bp}\mathbf{ }\mathbf{+}\mathbf{\text{'}}\mathbf{1}\mathbf{\text{'}}\mathbf{ }\mathbf{lp}\mathbf{ }\mathbf{;}\mathbf{ }{\mathbf{sp}}^{\mathbf{3}}\mathbf{d}\mathbf{-}\mathbf{Distorted}\mathbf{ }\mathbf{tetrahedral}\mathbf{ }\mathbf{\left(}\mathbf{or}\mathbf{\right)}\mathbf{ }\mathbf{see}\mathbf{-}\mathbf{saw}\mathbf{ }\mathbf{\left(}\mathbf{or}\mathbf{\right)}\mathbf{ }\mathbf{Z}\mathbf{-}\mathbf{shape}\mathbf{ }\mathbf{;} \\ {\mathbf{ClF}}_{\mathbf{3}}\mathbf{-}\mathbf{\text{'}}\mathbf{3}\mathbf{\text{'}}\mathbf{ }\mathbf{bp}\mathbf{ }\mathbf{+}\mathbf{\text{'}}\mathbf{2}\mathbf{\text{'}}\mathbf{ }\mathbf{lp}\mathbf{ }\mathbf{;}\mathbf{ }{\mathbf{sp}}^{\mathbf{3}}\mathbf{d}\mathbf{-}\mathbf{Bent}\mathbf{ }\mathbf{T}\mathbf{-}\mathbf{shape}\mathbf{ }\mathbf{;} \\ {\mathbf{XeF}}_{\mathbf{2}}\mathbf{-}\mathbf{\text{'}}\mathbf{2}\mathbf{\text{'}}\mathbf{ }\mathbf{bp}\mathbf{ }\mathbf{+}\mathbf{\text{'}}\mathbf{3}\mathbf{\text{'}}\mathbf{ }\mathbf{lp}\mathbf{ }\mathbf{;}\mathbf{ }{\mathbf{sp}}^{\mathbf{3}}\mathbf{d}\mathbf{-}\mathbf{Linear}\mathbf{ }\mathbf{;} \\ \mathbf{Note}\mathbf{;}\mathbf{ }\mathbf{Each}\mathbf{ }\mathbf{bonded}\mathbf{ }\mathbf{halogen}\mathbf{ }\mathbf{atom}\mathbf{ }\mathbf{has}\mathbf{ }\mathbf{\text{'}}\mathbf{3}\mathbf{\text{'}}\mathbf{ }\mathbf{lone}\mathbf{ }\mathbf{pairs}\mathbf{ }\mathbf{on}\mathbf{ }\mathbf{it}\mathbf{ }\mathbf{;} \end{gathered}$$