Crystal Engineering Using Bisphenols and Trisphenols. Complexes with Hexamethylenetetramine (HMTA): Strings, Multiple Helices and Chains-of-Rings in the Crystal Structures of the Adducts of HTMA with 4,4'-Thiodiphenol (1/1), 4,4'-Sulfonyldiphenol (1/1), 4,4'-Isopropylidenediphenol (1/1), 1,1,1-Tris(4-hydroxyphenyl)ethane (1/2) and 1,3,5-Trihydroxybenzene (2/3)

Abstract

The 4,4'-bisphenols (1), X(C6H4OH)2 [a, X = nil; b, X = O; c, X = S; d, X = 502; e, X = CO; f, X = CH2; g, X = CMe2; h, X = C(CF3)2], when co-crystallized from alcoholic solutions with hexam-

Path to achieving molecular dispersion in a dense reactive mixture

“…The most likely intermolecular interaction has been attributed to the possibility of hydrogen bonding that can form between the four equivalent nitrogens of HMTA and electron accepting functional groups. For example, previous diffraction studies have shown the possibility that one HMTA can cocrystallize with phenols . The corresponding 14 N quadrupole resonance spectroscopy has generally been used to characterize the intermolecular interactions, including hydrogen bonds …”

“…For example, previous diffraction studies have shown the possibility that one HMTA can cocrystallize with phenols. 20,35 The corresponding 14 N quadrupole resonance spectroscopy has generally been used to characterize the intermolecular interactions, including hydrogen bonds. 20 Since we are dealing with various solutions and the need to follow the crosslinking reaction, instead of using NMR, we used infrared spectroscopy to characterize intermolecular interactions in the prepolymer and furfural.…”

Self-Assembly of Tetraphenol and Its Complexes with Aromatic Diamines: Novel Interpenetrating and Noninterpenetrating Organic Assemblies

“…Aoyoma et al have reported 11-fold catenation in a tetraphenol−benzoquinone adduct. Alternatively, the packing in the diamondoid network can be visualized by considering the subunits of the adamantanoid cage as intertwining of eight 2 1 helical structures . The pitch of the helix is 25 Å (Figure a).…”

Hydrogen bonding patterns in a series of 1-arylcycloalkanecarboxamides

“…6 Changes in packing motifs resulting from small variations in molecular structure or substituents have also been observed with other compounds capable of homomeric hydrogen bonding (for example, carboxylic acids, 7 oximes 8 and secondary enaminones 9 ), as well as in many heteromeric hydrogen-bonded structures (for example, bisphenol-amine co-crystals). 10 Our interest in the title compounds originated from synthetic investigations first performed in the 1980s, when we prepared several 1-(2-halophenyl)cyclohexanecarboxamides as part of a model study to identify suitable precursors for the construction of oxindoles bearing spirocyclic rings at C-3. 11,12 These spiro-oxindoles in turn served as models for developing methodology aimed at the total synthesis of the complex spirooxindole alkaloid gelsemine.…”