An example of an organolithium compound is methyllithium ((CH3Li)x), which exists in tetrameric (x = 4, tetrahedral) and hexameric (x = 6, octahedral) forms.
ɐn ɛɡzˈæmpəl əvən ɔːɹɡˌænoʊlˈɪθiəm kˈɑːmpaʊnd ɪz mˌɛθəlˈɪθiəm sˌiːˈeɪtʃ θɹˈiː lˈaɪ ˈɛks, wˌɪtʃ ɛɡzˈɪsts ɪn tˌɛtɹɐmˈɛɹɪk ˈɛks ˈiːkwəlz fˈoːɹ, tˌɛtɹɐhˈiːdɹəl ænd hˌɛksɐmˈɛɹɪk ˈɛks ˈiːkwəlz sˈɪks, ˌɑːktɐhˈiːdɹəl fˈɔːɹmz.