An analysis of the structures of ®ve new cocrystals with saturated hydrogen bonding between amines and alcohols is presented. These ®ve are all cocrystals with p-phenylenediamine (PDA) and a mono-or diol. The cocrystals are. These crystals have two distinctly different supramolecular hydrogen-bond patterns, when considering only the hydroxyl and amine groups. There are, in addition, variations in the ways covalently bonded crosslinks connect these hydrogen-bond networks. The graph sets of the hydrogen-bond networks of these and other published saturated amine±alcohol crystals are compared and suggestions made on how to present the graph-set descriptions, especially those involving in®nite two-and three-dimensional networks of intersecting chains which are characteristic of most of these materials.

Triphenyl-?re-hydroxyphenyltin, diphenyldi-m-hy droxyphenyltin, phenyltri-m-hydroxyphenyltin, and tetra-m-hydroxyphenyltin have been prepared. All are insoluble in water while their solubility in base increases as the number of hydroxyphenyl groups increases. Triphenyl-m-hydroxyphenyltm reacts with ethyl bromoacefcate to give ethyl m-triphenylstannylphenoxyacetate.Pure azo-tin dyes could not be obtained from the reaction of triphenyl-ro-hydroxyphenyltin with p-bromo-, p-carboxy-, and p-nitrobenzenediazonium fluoborate in neutral or sodium carbonate buffered solutions,

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