Destroyer OChem #174

[El Sol]

The answer is B, which to me looks like a ketal. Only difference is R3 and R4 are the same group (CH3).

So is a ketal also considered an acetal, when the two alkoxy groups are the same?

Solution say's that B is a "diether linkage" and that is an acetal.

Any help?

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[rollredroll]

I guess now they're calling any ketal,acetal,hemiketal, or hemiacetal molecule just an acetal. it sucks i know. i learned to classify them according to the other 4 names.