a) When 62.8 g of an alkyl halide derivative D were dissolved in 106 g of 1-butanol, the boiling point of the mixture wa

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a) When 62.8 g of an alkyl halide derivative D
were dissolved in 106 g of 1-butanol, the boiling point of the
mixture was 120.9 ℃. Deduce and draw the structure of
D, given that there are 2.5 times the number of
chlorine atoms than carbon atoms in the compound.
b) One way in which the
stoichiometry of a complex ion can be determined is by measuring
the color intensities of solutions containing different proportions
of the ligand and metal ion. In one such experiment, the maximum
color intensity was observed when 5.2 cm3 of a 1 x
10-3 M manganese ion solution and 1.56 cm3 of
a 1 x 10-2 M solution of ethylenediamine were mixed.
Given that one mole of a compound
containing the complex ion from this mixture produces three moles
of silver chloride when the compound reacts with excess silver
nitrate, show whether the compound is diamagnetic or
paramagnetic.