(b) Explain why the O–F bonds in dioxygen difluoride, O2F2 (157.5 pm) are much longer than those in oxygen difluoride, OF2 (140.5 pm).

(c) Disulfur difluoride, S2F2, exists as two structural isomers. One isomer is analogous in structure to dioxygen difluoride, O2F2, but the second, more thermodynamically stable isomer, has a structure in which the two sulfur atoms are in different chemical environments. Draw a Lewis structure of the more stable isomer of disulfur difluoride, S2F2, and sketch or describe its three-dimensional shape.

題組內容

(b) Explain why the O–F bonds in dioxygen difluoride, O₂F₂ (157.5 pm) are much longer than those in oxygen difluoride, OF₂ (140.5 pm).

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