[问答题]
1.Determine the missing name and structur36zp : ru(kn9p91tuyln le .jwe using IUPAC pwyl;h 0v8l*i naming rules.
IUPAC Name Structural formula 2,3-dimethylbutane
2.Determine whether the following molecules are primary, secondary or tertiary halogenoalkanes.
Molecule Primary, secondary or tertiary $CH_3CHClCH_2CH_3$
2-bromo-2-methylbutane