Why the boiling point of ammonia does not follow this trend

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Dear Sir, I would be grateful for your help, If you could explain the trend in boiling points from phosphine to stibine. I would also want to know why the boiling point of ammonia does not follow this trend?

Reference no: EM131211406

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Why the boiling point of ammonia does not follow this trend : Dear Sir, I would be grateful for your help, If you could explain the trend in boiling points from phosphine to stibine. I would also want to know why the boiling point of ammonia does not follow this trend?
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