. 2021 Aug 4;6(32):21139–21146. doi: 10.1021/acsomega.1c03059

Table 1. Summary of Structural Features of 1–4.

compound	[npBifc]Tf₂N (1)	[Bifc]Tf₂N (2)	[FeCp₂]Tf₂N (3)	[CoCp₂]Tf₂N (4)
cation–anion arrangement	segregated stack	alternating	^a	^a
transition temperature^b	147.7	223	198.8^c	255.4^d
RT phase cation valence state	averaged	trapped
anion ordering	disordered	disordered	disordered	disordered^d
LT phase cation valence state	intermediate	trapped
anion ordering	ordered	mostly ordered	mostly ordered	ordered
V_LT phase/V_RT phase^e	2	6	2	2^d

Complicated arrangement.

Phase transition accompanying anion ordering.

Reference (24).

Reference (36).

Ratio of unit cell volumes.