Untersuchungen zur struktur des adduktes aus hydrochinon und N-methylpyrrolidon-(2)

Behmel, P.; Weber, G.

doi:10.1016/0022-2860(84)87039-8

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…10 Even though the structure of 2 has a low volume percentage of HQ compared to 1 and 3, it is the highest of any HQ co-crystal involving a cis-conformer, as these have a tendency to crystallize with large molecules. 18 Properties can be plotted on the Hirshfeld surface, which is defined by the molecular environment of the molecules. Alternatively, properties such as the electrostatic potential can be plotted on molecular electron density isosurfaces.…”

Section: Hirshfeld Surface Analysismentioning

confidence: 99%

Three new co-crystals of hydroquinone: crystal structures and Hirshfeld surface analysis of intermolecular interactions

et al. 2010

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Hydroquinone (benzene-1,4-diol or quinol) is reported here to form co-crystals in different ratios with propan-2-ol, N,N-dimethylacetamide (DMA) and N,N-diethylformamide (DEF). Investigation of intermolecular interactions and crystal packing via Hirshfeld surface analysis reveals that more than two-thirds of the close contacts are associated with relatively weak HÁ Á ÁH, CÁ Á ÁH and HÁ Á ÁC interactions. The use of Hirshfeld surfaces in combination with fingerprint plots demonstrates that these weak interactions are important for both local packing and crystal packing. The complexes highlight the way in which electrostatic complementarity to a large extent governs the hydrogen bonding pattern in molecular crystals.Scheme 1

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Section: Hirshfeld Surface Analysismentioning

confidence: 99%

Three new co-crystals of hydroquinone: crystal structures and Hirshfeld surface analysis of intermolecular interactions

et al. 2010

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“…Previous structure determinations of NMP have been carried out, however, but were undertaken on molecules which either had co-crystallized with or were hydrogen-bonded to other molecules (Carrell, Glusker, Job & Bruice, 1977;Peters, Ott & von Schnering, 1982a, b,c;Behmel & Weber, 1984;Langer, Huml & Zachov~, 1984;Hailer, Rheingold & Brill, 1985;Kinoshita, Shimoi & Ouchi, 1986;Mizuguchi & Rihs, 1992). Due to their cyclic nature, the conformation about their amide (peptide) bonds is reversed with respect to that found in open-chain amides, as e.g.…”

Section: Introductionmentioning

confidence: 99%

Methyl group conformation-determining intermolecular C–H...O hydrogen bonds: structure of N-methyl-2-pyrrolidone

Müller¹,

Lutz²,

Harder³

1996

Acta Crystallogr Sect B

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“…In this structure the interplanar distance is close to 5.5 /~. The pyrrolidone rings (if alternate rings are counted) are located at the same distance [7]:…”

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confidence: 98%

Thermal analysis in the investigation of composite polymers

Sazanov

1990

Journal of Thermal Analysis

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The methods of thermal analysis are successfully used for identification of the processes of formation, degradation and strueturization of composite polymers. On the examples of the investigation of the thermoehemical reactions of polyamic acids with polystyrene, polyvinylpyrolidone, polyaerylonitrile, polyvinyltetrazole and epoxy and furol resins, the high yield of information by the methods of thermal analysis in the investigation of these polymers is demonstrated.At present, there is considerable interest in the problem of the compatibility of various polymers. For the solution of practical problems, it is necessary in many cases to prepare materials whose properties cannot be ensured by one polymer alone. This is particularly so for block and graft copolymers, in the synthesis of which it is possible to combine some opposite characteristics of the initial polymers, e.g. hydrophobicity and hydrophilicity, strength and flexibility, thermoplastic and thermosetting properties, etc. Besides copolymer materials in which elementary fragments or blocks of initial homopolymers are bonded to each other by chemical bonds, there are also composite material in which the homopolymers are joined according to other principles. The deciphering of the mechanism for the formation of composites, and the search for the relationships responsible for the appearance of new qualities of composites differing from those of the initial polymers, is an interesting and feasible problem of thermal analysis. It should be noted that in many cases the formation of composite polymers proceeds at high temperatures, which makes it possible to apply widely all methods of thermal analysis, both in the stage of formation of the John Wiley & Sons, Limited, Chichester Akad~rniai Kiadb, Budapest

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Untersuchungen zur struktur des adduktes aus hydrochinon und N-methylpyrrolidon-(2)

Cited by 9 publications

References 7 publications

Three new co-crystals of hydroquinone: crystal structures and Hirshfeld surface analysis of intermolecular interactions

Three new co-crystals of hydroquinone: crystal structures and Hirshfeld surface analysis of intermolecular interactions

Methyl group conformation-determining intermolecular C–H...O hydrogen bonds: structure of N-methyl-2-pyrrolidone

Thermal analysis in the investigation of composite polymers

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