ðə ɹˈeɪt ʌv ɐdˈɪʃən tʊ ʌnsˈætʃɚɹˌeɪɾᵻd kˈɑːɹbəŋkˈɑːɹbən bˈɑːndz ɪz tˈɜːmɪnəl ˈælkaɪn tˈɜːmɪnəl ˈælkiːn ɐpɹˈɑːksɪmətli ɪntˈɜːnəl ˈælkaɪn dɪsˈʌbstɪtˌuːɾᵻd ˈælkiːn ɐkˈɪl kˈɑːmplɛksᵻz kæn biː dʒˈɛnɚɹˌeɪɾᵻd baɪ ɪnsˈɜːʃən ʌv sˌiːˈoʊ ˌɪntʊ ðə sˈiː zˌiːˈɑːɹ bˈɑːnd ɹɪzˈʌltɪŋ fɹʌm hˌaɪdɹəzˌɜːkənˈeɪʃən.
The rate of addition to unsaturated carbon-carbon bonds is terminal alkyne > terminal alkene ≈ internal alkyne > disubstituted alkene  Acyl complexes can be generated by insertion of CO into the C–Zr bond resulting from hydrozirconation.