Hexamethylenetetramine: An old new building block for design of coordination polymers

Serendipitous compositional and structural diversity in urotropine adducts of binary cadmium xanthates

“…The zero-dimensional aggregate seen in 3 has only one precedent in the literature, namely in the structure of [{Cd(S2COEt)2}2L2], where L is the S-bound thiourea derivative, bis(4-methoxyphenyl)thiourea [78] but resembles the almost universally adopted structural motif adopted by binary cadmium dithiocarbamates [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. As revealed in the previously mentioned review of the inverse coordination propensities of hmta in non-silver containing coordination polymers [67], µ2-, µ4-and µ4-bridging modes have been observed but terminally bound examples are comparatively rare in this context. In 1,1-dithiolate chemistry, there are no literature precedents of cadmium xanthates or dithiocarbamates with hmta but there are three examples of zero-dimensional aggregates for cadmium dithiophosphates and dithiophosphinates ( -S2PR2) with hmta.…”

“…Bridging, i.e. µ2-, µ3-and even µ4-hmta, predominates with terminal coordination of hmta observed in less than 5% of the discussed coordination polymers (excluding those containing silver) [67]. With this background in mind, an exploration of adduct formation between each of Cd(S2COR)2, R = Me, Et and iPr, and hmta is described in which the ratio of Cd(S2COR)2 to hmta was varied from 1:1, 2:1 and 1:2, was undertaken.…”

Crystal structure of catena-poly[(μ 2-hexamethylenetetramine-κ 2 N:N′)-tetrakis(μ 2-2,6-difluorobenzoato-κ 2 O:O′)dicopper(II)], C34H24Cu2F8N4O8

“…Lots of coordination polymers built from bipyridines and pyrazines are reported, while hexamethylenetetramine (hmt) was explored to a less extent [13].…”

Mono urotropine adducts of some binary zinc xanthates and dithiocarbamates: solid-state molecular structures and supramolecular self-assembly

“…With four potential donor atoms for metals, it is not surprising that this molecule has long attracted the attention of coordination chemists, in particular in the context of constructing metal-organic frameworks (MOFs) [2][3][4]. While not as well studied as poly-pyridyl linkers in the constructions of MOF's, μ 2 -, μ 3 -and μ 4 -coordination modes of hmta have been revealed by crystallography.…”