“…We subsequently found that transition-metal halide compounds with twofold positively charged cations such as Cd II that also show a pronounced structural variability can be obtained by this route (Na ¨ther et al, 2017;Jess et al, 2020). In most cases, discrete CdX 2 complexes are observed (Ghanbari et al, 2017;Liu, 2011), but these units can also condense into dinuclear (Santra et al, 2016;Xie et al, 2003) and tetranuclear units (Zhu, 2011) or polymers (Nezhadali Baghan et al, 2021;Satoh et al, 2001), where the latter can be further linked by the coligands into layers (Hu et al, 2009;Marchetti et al, 2011).…”