Anomalous pattern in CCl4 and SiCl4 m.p's:
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Posted by QuasiQuasar on June 29, 19101 at 08:21:15:
How can we explain why the melting points of carbon tetrachloride and silicon tetrachloride do not follow the trend in melting points of group 4 compounds down the group?
Down the group the m.p is expected to increase as an increase in size causes a strengthening of the Van der Waal's forces.
However m.p of CCl4 = -23oC and that of SiCl4 = -70oC while the latter has to be higher than the former!!
Queer isn’t it??
Till now I’ve found no explanation to this. What despair!! Some help needed please…
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