[C(NH2)]-:
(i) Lewis structure:
The most stable Lewis structure for [C(NH2)]- is:
$$\chemfig{N(-[:0]H)(-[:90]H)-[:180]C(-[:270]H)(-[:135]H)(-[:225]H)}$$
(ii) Oxidation states:
N: -3, C: -2, H: +1
(iii) Stereochemical structure (VSEPR):
The nitrogen atom has
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