different between diastereoselectivity vs diastereoselective

English

dia- +? stereoselectivity

diastereoselectivity (plural diastereoselectivities)

(organic chemistry) The preferential formation of one diastereoisomer over another; also, the degree of said preference

diastereoselective (comparative more diastereoselective, superlative most diastereoselective)

Of, pertaining to, or exhibiting diastereoselectivity
Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-Aldrich
This electronwithdrawing functionality not only inhibits the tendency of vinyldiazomethanes to rearrange to 3H-pyrazoles, but is also necessary to achieve highly diastereoselective cyclopropanations.

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