*REACTIONS OF ALKYNES* _MNEMONIC_ *(ADDICTS)* ♦️ *A* Addition of h2 (hydrogenation ). ♦️ *D* Dimerization (formation of alkenes) ♦️ *D* Diels-Alder reaction (cyclo addition). ♦️ *I* Internal alkylation (formation of alkynides). ♦️ *C* coupling reactions. ♦️ *T* Tautomerization. ♦️ *S* Substituion reactions (e.g halogenation , sulfonation). If you want helpful stuff to be shared on daily basis then give it a ❤️