Table 1.

Collision cross-sections (Ų) of selected POSS compounds [76].

Name	X-raya,b	ESI (Na+)	MALDI (Na+)	Theory (Na+)
Cy6T6	224	221	225	222
Bz8T8	265
Ph8T8		260	263	267
Sty8T8c	341		340	338
			330	328
			324	320
			310	307
			293	295
Vi10T10		189	193	192
Vi12T12	212	214	216	216
H14T14	137			139
Cp4D4(OH)4	154		157	153
Cy6T4D2(OH)2	222	220	222	222
Cy7T4D3(OH)3	248	247	254	251

^aStructures obtained from Dr. Tim Haddad at ERC Inc.–Air Force Research Laboratory.

^bCalculated value for the neutral species.

^cThere were five different conformations of the styrl groups capping the silicon atoms observed in the ATD [77].