ɪn səlˈuːʃən æt lˈoʊ kˌɑːnsəntɹˈeɪʃənz ðɪs mˌɑːnoʊmˈɛɹɪk stɹˈʌktʃɚ pɹɪdˈɑːmᵻnˌeɪts, bˌʌt æt hˈaɪɚ kˌɑːnsəntɹˈeɪʃənz ˈɛvɪdəns sədʒˈɛsts wˈiːk ɐsˌoʊsɪˈeɪʃən bᵻtwˌiːn sˈiː ˈɛf fˈoːɹ mˈɑːlɪkjˌuːlz lˈiːdɪŋ tʊ ɐ dɪstˈɔːɹɾᵻd ˌɑːktɐhˈiːdɹəl koʊˈɔːɹdᵻnˈeɪʃən ɚɹˈaʊnd ðə sɛlˈiːniəm ˈæɾəm.
In solution at low concentrations this monomeric structure predominates, but at higher concentrations evidence suggests weak association between SeF4 molecules leading to a distorted octahedral coordination around the selenium atom.