Match cach pair of compounds on the left and its corresponding melting points (m

Question

Match cach pair of compounds on the left and its corresponding melting points (m.p.) or boiling points (b.p.) in degreeC to a major reason, given on the right, why the physical property increases. Answers may be repeated. CH_3CH_2PHCH_3 (m.p. -160), CH_3P(CH_3)_2 (m.p. -85) CH_3N(CH_3)_2 (mp. -117), CH_3P(CH_3)_2 (m.p. -85) CH_3CH_2NHCH_3 (b.p. 36), CH_3(CH_2)_2NH_2 (B.p. 48) (CH_3)_2CHNH_2 (b.p- 33), CH_3CH_2NHCH, (b.p. 36) CH_3(CH_2)_2NH_2 (b.p. 48), CH_3(CH_2)_2OH (b.p. 97) more weight more van dcr Waal interactions more rotational symmetry more polar bonds more hydrogen bonds

Explanation / Answer

1. c (CH3P(CH3)2 is more symmetrical)

2. a

3. d (two NH2 polar bonds)

4. b (more surface area, more vander Waal interaction)

5. e (OH can for stonger H-Bond within molecules)

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