Association, chain modes

Another problem that must be faced if we concentrate only on polypeptide chain vibrations is the contribution of side-chain modes to the spectrum. At the very least, we must be able to identify characteristic frequencies associated with side-chain groups and S-S bridges. We first review below what is known about these structures. 

Pre-crystalline structures characteristic of modes (i) and (ii) can be identified with bundles [7-9], i.e., energy-driven hexagonal associations among chain segments, which are essentially consecutive in solution. Within the... 

The structural chemistry of some metal dithiocarbamates, i.e. systematics, coordination modes, crystal packing, and supramolecular self-assembly patterns of nickel, zinc, cadmium, mercury,363 organotin,364 and tellurium,365 366 complexes has been thoroughly analyzed and discussed in detail. Supramolecular self-assembly frequently occurs in non-transition heavier soft metal dithiocarbamates. Thus, lead(II),367 bismuth(III)368 zinc,369 cadmium,370 and (organo)mercury371 dithiocarbamates are associated through M- S secondary bonds, to form either dimeric supermolecules or chain-like supramolecular arrays. The arsenic(III)372 and antimony(III)373 dithiocarbamates are... 

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