. 2024 Jul 31;80(Pt 8):894–909. doi: 10.1107/S2056989024007266

Table 19. Summary of packing features.

Compound	No. of axial Au⋯X contacts	Offset-stacked dimers [(Au—X)₂ quadrilaterals]	Connected to form ⋯^b	Further linkages^b
(py)AuCl (Adams & Strähle, 1982 ▸)	2	yes	double chain (ladder) via edge-linked quadrilaterals
1a and 2 (isotypic)	1	yes	double chain via X⋯X contacts
1b	0	no	double chain via Cl⋯Cl and H⋯Cl contacts
3	2	yes	layer via Br⋯Br contacts	layers connected via Br⋯Br contacts
4 (both molecules)	1	yes	double chain via Br⋯Br contacts (analogous to 1a and 2)	layers connected via Br⋯Br contacts
5	2	yes	chain via apex-linked quadrilaterals	connected to form layers via Cl⋯Cl contacts
6	1	yes	double chain via Br⋯Br contacts (analogous to 1a and 2)	connected to form double layer via Br⋯Br contacts
7	0	no	layer via H⋯Cl and Cl⋯π contacts
8	Au1 2, Au2 0	Au1 yes, Au2 no	layer via Br⋯Br contacts	layers connected via Br⋯Br contacts
ESITIM (Hobbollahi et al., 2019 ▸)^a	2	no	layer structure with linked tetrameric rings
WEFQAD (Pizzi et al., 2022 ▸)^a	2	yes	ladder structure	ladders connected via Br⋯Cl contacts
WEFQEH (Pizzi et al., 2022 ▸)^a	2	no	layer structure analogous to ESITIM	layers connected via F⋯F contacts
WEFQIL (Pizzi et al., 2022 ▸)^a	2	yes	chain via apex-linked quadrilaterals	connected to form layers via Cl⋯Cl_py contacts
WEFQOR (Pizzi et al., 2022 ▸)^a	2	yes	ladder structure	connected to form layers via I⋯Cl contacts.
WEFRAE (Pizzi et al., 2022 ▸)^a	2	yes	chain via apex-linked quadrilaterals	connected to form layers via Br⋯Br contacts

Notes: (a) Refcodes refer to structures whose packing is discussed in the section Database survey; (b) these columns do not necessarily present an exhaustive list; see text for further details.