Formamide solution of lead(II) iodide (Pbl2) with hexamethylenetetramine (hmta) gave [C6H13N4]2[Pb3I8(C6H12N4)2], while reaction of PbI2 with hmta through intervention of water produced [C6H13N4][PbI3]. From characterization of the crystals by X-ray diffraction, hmta appears to tend to be protonated cations, but one of hmta is coordinated to Pb atom in the former compound.
No takes yet. Share an insight, caveat, or question.
Miyamae et al. (1988) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: