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What makes a meso compound?

Answer 1

A meso compound is characterized by the presence of an internal mirror plane.

A meso compound is a symmetric #RS# isomer; i.e. its 2 potential chiral centres map onto each other on inversion. Given this property, a meso compound is NOT optically active, You should check your text for proper examples.

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Answer 2

Ava Andrews

A meso compound is a molecule that contains multiple stereocenters but is optically inactive due to internal compensation. This occurs when the molecule has an internal plane of symmetry that divides it into two halves that are mirror images of each other, effectively canceling out any optical activity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.