Table 8. Experimental details.

	(1)	(2)	(3)	(4)	(5)
Crystal data
Chemical formula	[ZnCl2(C7H7NO)2]	[ZnCl2(C8H9NO)2]	[ZnCl2(C8H9NO)2]	[ZnCl2(C8H9NO)2]	[ZnCl2(C7H7NO2)2]
M r	378.54	406.59	406.59	406.59	410.54
Crystal system, space group	Monoclinic, P21/n	Monoclinic, P21	Monoclinic, C2/c	Monoclinic, P21/c	Monoclinic, C c
Temperature (K)	100	100	100	100	100
a, b, c (Å)	20.6241 (11), 7.3309 (4), 20.6485 (11)	7.3802 (3), 8.2491 (3), 14.5953 (5)	13.9452 (11), 18.9742 (16), 7.0651 (6)	6.8376 (4), 17.2694 (9), 14.9856 (7)	7.0532 (6), 21.3776 (17), 11.1181 (9)
β (°)	90.532 (1)	97.852 (1)	108.021 (2)	96.893 (2)	106.477 (2)
V (Å3)	3121.8 (3)	880.23 (6)	1777.7 (3)	1756.73 (16)	1607.5 (2)
Z	8	2	4	4	4
Radiation type	Mo Kα	Mo Kα	Mo Kα	Mo Kα	Mo Kα
μ (mm−1)	1.92	1.71	1.69	1.71	1.88
Crystal size (mm)	0.6 × 0.60 × 0.35	0.5 × 0.16 × 0.11	0.42 × 0.14 × 0.14	0.56 × 0.18 × 0.09	0.15 × 0.09 × 0.07
Data collection
Diffractometer	Bruker APEXII CCD	Bruker APEXII CCD	Bruker APEXII CCD	Bruker APEXII CCD	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 ▸)	Multi-scan (SADABS; Krause et al., 2015 ▸)	Multi-scan (SADABS; Krause et al., 2015 ▸)	Multi-scan (SADABS; Krause et al., 2015 ▸)	Multi-scan (SADABS; Krause et al., 2015 ▸)
Tmin, Tmax	0.558, 0.746	0.478, 0.680	0.620, 0.746	0.629, 0.746	0.673, 0.746
No. of measured, independent and observed [I > 2σ(I)] reflections	48491, 9668, 9501	20749, 5348, 5135	12177, 2295, 2023	33806, 5376, 4283	17255, 4168, 3809
R int	0.023	0.025	0.027	0.051	0.042
(sin θ/λ)max (Å−1)	0.718	0.714	0.676	0.715	0.676
Refinement
R[F2 > 2σ(F 2)], wR(F 2), S	0.022, 0.053, 1.07	0.018, 0.039, 1.00	0.022, 0.059, 1.05	0.031, 0.069, 1.01	0.030, 0.065, 1.05
No. of reflections	9668	5348	2295	5376	4168
No. of parameters	404	223	113	222	227
No. of restraints	8	5	17	4	8
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement	H atoms treated by a mixture of independent and constrained refinement	H atoms treated by a mixture of independent and constrained refinement	H atoms treated by a mixture of independent and constrained refinement	H atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å−3)	0.43, −0.35	0.31, −0.24	0.39, −0.26	0.46, −0.32	0.46, −0.29
Absolute structure	–	Refined as an inversion twin.	–	–	Refined as an inversion twin
Absolute structure parameter	–	0.016 (6)	–	–	0.024 (13)

Computer programs: BIS (Bruker, 2020 ▸), SAINT (Bruker, 2020 ▸), SHELXT (Sheldrick, 2015a ▸), SHELXL2018/3 (Sheldrick, 2015b ▸), CrystalMaker (Palmer, 2020 ▸), OLEX2 (Dolomanov et al., 2009 ▸), and publCIF (Westrip, 2010 ▸).