Table 1.

Examples of SC–SC transitions and the crystallographic volume changes involved. POCOP=1,3-[OP{C₆H₂(CF₃)₃-2,4,6}₂]₂C₆H₃; NCN=C₆H₂-5-(OH)-1,3(CH₂NMe₂)₂; SⁱPr=N,N′-(2,6-; TPP= tetraphenylporphyrin; oep=octaethylporphyrinato dianion; NBD=C₇H₈; NBA= C₇H₁₂; Ar^F=3,5-C₆H₃(CF₃)₂; TMP=2,3,5,6-tetramethylpyrazine.

	entry	starting complex space group, volume (Å3), z	product space group, volume (Å3), (z)	[change in volume (Å3)] and percentage change. For z=1 equivalent
1	Brookhart and co-workers [13]	(POCOP)Ir(N2); , 3002.11(14), z=2	(POCOP)Ir(O2); , 3046.3(10), z=2	[+22] +1.4%
			(POCOP)Ir(CO); , 3000.1(2), z=2	[−1] −0.06%
			(POCOP)Ir(C2H4); , 3020.6(2), z=2	[+9] +0.6%
			(POCOP)Ir(H)2(H2); , 2986.6(4), z=2	[−8] −0.6%
			(POCOP)Ir(NH3); , 3003.56(19), z=2	[+1] +0.04%
2	van Koten and co-workers [71]	(NCN)PtCl; Pna21, 1346.0(4), z=4	(NCN)PtCl(SO2); Pna21, 1557.5(4), z=4	[+53] +15.7%
3	Crudden and co-workers [70]	(SIPr)RhCl(N2); P21212, 2855.15(8), z=2	(SIPr)RhCl(O2); P21212, 2852.13(12), z=2	[−3] −0.1%
		(SIPr)RhCl(O2); P21212, 2852.13(12), z=2	(SIPr)RhCl(CO); P21212, 2861.5(3), z=2	[+9] +0.4%
4	McKeown and co-workers [33]	PNC[ctBuNC-Fe-vtBuNC]; Pn–3n, 52348.5(7), z=12	PNC[ctBuNC-Fe-v(py)0.7(tBuNC)0.3]; Pn–3n, 52736(2), z=12	[+32] +0.7%
			PNC[cMeOH-Fe-vMe(C3N2H3)]; Pn–3n, 52819.6(12), z=12	[+39] +0.8%
			PNC[vtBuNC-Fe-c(4,4-bipy)-Fe-vtBuNC)]; Pn–3n, 54263.4(5), z=12	[+160] +3.7%
			PNC[vN2-Fe-cCN(C6H4)NC-Fe-vN2)]; Pn–3n, 53204(5), z=12	[+71] +1.6%
5	Balch and co-workers [77]	α-Au2(μtPh2PCH2CH2-PPh2)2I2.(OCMe)2; P21/c, 2824.28(13) z=2	βAu2(μ–Ph2PCH2CH2PPh2)2I2.(OCMe)2; , 1411.99(7), z=1	[−0.2] ∼0%
6	Brill, Rheingold and co-workers [78]	(η5-C5H5)Co(S2C6H4); P21/c, 2159.1(6), z=8	[(η5-C5H5)Co(S2C6H4)]2;P21/c, 1031.2(3), z=2 (dimer)	[−12] −4.5%a
7	Richter-Addo and co-workers [82–84]	(TPP)Fe{OC(=O)CF3}; , 2093.1(3), z=2	(TPP)Fe(NO){OC(=O)CF3}; , 2144(3), z=2	[+25] +2.4%
		[(TPP)Fe(H2O)][OC(=O)CF3]; , 1833.4(3), z=2	[(TPP)Fe(NO)(H2O)][(TPP)Fe(H2O)] [OC(=O), 3818.2(16), z=2	[+38] +4.1%b
		[(oep)Fe{S-2,6-(CF3CONH)2C6H3}]; , 2266.3(6), z=2	[(oep)Fe(NO){S-2,6-(CF3CONH)2C6H3}]; , 2360(2), z=2	[+47] +4.1%
8	Weller and co-workers [85]	[Rh(iBu2PBu2)(η2η2-NBD)][BArF4]; C 2/c, 5957.62(18), z=4	[Rh(iBu2PBu2)(η2η2-NBA)][BArF4]; C 2/c, 6044.1(3), z=4	[+22] +1.5%
9	Ozerov and co-workers [80,81]	RhCl[(iPr2P(C6H3Me))2NMe]; P212121, 5955(4), z=8	Rh(Me)Cl[(iPr2P(C6H3Me))2N]; P212121, 5976(4), z=8	[+21] +0.4%
10	Brammer and co-workers [74]	[Ag4(O2C(CF2)2CF3)4(TMP)3]n; , 1405.34(6), z=1	[Ag4(O2C(CF2)2CF3)4(TMP)3(iPrOH)]n; , 1545.9(2), z=1	[+140.6] +10.0%