Table 1. Crystallographic data of the ambient pressure (op) and high pressure (cp) phases of 1 and 2 as determined from PXRD data.

Compound	1-op	1-cp	2-op	2-cp
p/GPa	∼10–4	0.075(10)	∼10–4	0.18(6)
a/Å	15.502(3)	14.235(12)	15.440(2)	13.981(9)
b/Å	15.524(2)	14.874(18)	15.5102(18)	15.045(13)
c/Å	18.079(3)	16.33(2)	18.082(2)	16.636(15)
α/°	90	90	90	90
β/°	90	91.55(3)	90	90.761(11)
γ/°	90	90	90	90
V/Å3	4350.9(13)	3457(7)	4330.1(9)	3499(5)
S.G.	Pbca	P21/c	Pbca	P21/c