These are unstable and eventually become the more thermodynamically stable alkali metal amide and hydrogen gas.
ðiːz ɑːɹ ʌnstˈeɪbəl ænd ᵻvˈɛntʃuːəli bɪkˌʌm ðə mˈoːɹ θˌɜːmoʊdaɪnˈæmɪkli stˈeɪbəl ˈælkəlˌaɪ mˈɛɾəl ɐmˈaɪd ænd hˈaɪdɹədʒən ɡˈæs.