1	FSO	Iron/sulfur/oxygen hybrid cluster	1.000
2	VQ8	Hybrid cluster	0.900
3	T2N	3,5-dioxa-7-thia-1-thionia-2$L^{2},4$L^{2},6$L^{3},8$L^{2}-tetraferrabicyclo[4.2.0]octane	0.800