17. For the following chemical species, write the Lewis dot structure that minimizes formal charge, give the formal charge and oxidation number on each atom, show the structure including estimates of all bond angles accurate to ±2°, give the likely hybrid on the central atom, and give the point group: NH_{2}Cl; SF_{3}^{+}; SOF_{4}.

Answer

NH_{2}Cl:

Lewis structure:

Formal charges: N, 0; H, 0; Cl, 0. Oxidation numbers: N, –1; H, +1; Cl –1.

Structure:

Bond angles: H-N-H, ~106°; H-N-Cl, ~108°.

N hybrid: sp

^{3}Point group: C

_{s}

SF_{3}^{+}:

Lewis structure:

Formal charges: S, +1; F, 0. Oxidation numbers: S, +4; F, –1.

Structure:

Bond angles: F-S-F, ~107°.

S hybrid: sp

^{3}Point group: C

_{3v}

SOF_{4}:

Lewis structure:

Formal charges: S, 0; O, 0; F, 0. Oxidation numbers: S, +6; O, –2; F –1.

Structure:

Bond angles: F-S-F, ~88° and ~118°; F-S-O, ~92° and ~122°.

S hybrid: dsp

^{3}Point group: C

_{2v}