ðə stɹˈɛŋθ ʌvðə sˈiːlˈaɪ bˈɑːnd hˈæzbiːn ˈɛstᵻmˌeɪɾᵻd æɾ ɚɹˈaʊnd fˈɪfti sˈɛvən kˈeɪkˈæl slˈæʃ mˈɑːl fɹʌm ˌaɪˈɑːɹ spˌɛktɹəskˈɑːpɪk mˈɛʒɚmənts.
The strength of the C-Li bond has been estimated at around 57 kcal/mol from IR spectroscopic measurements.