\(SF _4\) has a trigonal bipyramidal structure with lone pair of electron in the equatorial position. \(F - S - F\) bond angle is \(101^{\circ}\).

\(OSF _4\) has a \(p\) character due to double bond hence bond angle is more.

In the trigonal-bipyramidal species \(H _2 C = SF _4\) the \(H\) atoms are located in the plane of the axial \(F\) atoms. There are no lone pair in \(CH _2= SF _4\) molecule.

The \(F - S - F\) bond angle is \(97^{\circ}\). More s character of lone pair leads to increase concentration of \(p\) character of fluorine.

Thus the bond angle is more as \(p\) character of fluorine atom is more as compared to \(SF _4= CH _2\)