a. A tin atom can bridge two Fe2(CO)8 groups in a structure similar to that of spiro...

a. A tin atom can bridge two Fe₂(CO)₈ groups in a structure similar to that of spiropentane. Show that these two molecules are composed of isolobal fragments.

b. Tin can also bridge two fragments; the compound formed has Mn–Sn–Mn arranged linearly. Explain this linear arrangement. (Hint: find a hydrocarbon isolobal with this compound. See W. A. Herrmann, Angew. Chem., Int. Ed. ,1986 , 25 , 56.)