Homologe und isomere Reihen

Breusch, F. L.

doi:10.1007/bfb0050746

Cited by 26 publications

(13 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The phenomenon of melting point alternation in n-alkanes and in most end-substituted n-alkanes has been known for decades. 1 Physical properties such as solubility and sublimation enthalpy that are related to the solid state also exhibit an alternating pattern, 2 whereas those related to the liquid state show monotonic behaviours. There is a vast literature on this phenomenon and various structural models have been put forward to explain the melting point alternation in n-alkane derivatives.…”

mentioning

confidence: 99%

Remarkable reversal of melting point alternation by co-crystallization

et al. 2010

View full text Add to dashboard Cite

mentioning

confidence: 99%

Remarkable reversal of melting point alternation by co-crystallization

et al. 2010

View full text Add to dashboard Cite

“…First, pure Me-mHB is higher melting than pure Br-mHB (142 °C vs 134 °C), whereas substutition of bromine for methyl commonly raises the melting point because of increased van der Waals and dipolar attraction …”

Section: Resultsmentioning

confidence: 99%

Using Hydrogen-Bonds and Herringbone Packing to Design Interfaces of 4,4‘-Disubstituted meso-Hydrobenzoin Crystals. The Importance of Recognizing Unfavorable Packing Motifs

1998

View full text Add to dashboard Cite

Five pure 4,4‘-disubstituted meso-hydrobenzoins and one solid solution have been investigated crystallographically. The aim was to establish whether a favorable hydrogen-bonding network and aromatic herringbone packing motif might make the lamellar structure shared by meso-hydrobenzoin (mHB) and meso-hydroanisoin sufficiently robust to serve as a reliable template on which to construct isomorphous surfaces containing various functional groups. Complete structures of the 4,4‘-difluoro-, 4,4‘-dichloro-, and 4,4‘-dibromo-meso-hydrobenzoins and an average structure of the disordered 4,4‘-dimethyl derivative were determined by X-ray diffration. Partial structures of twinned or disordered crystals of the 4,4‘-diethyl derivative and of the 1:1 mixed crystal of the 4,4‘-dimethyl and 4,4‘-dibromo derivatives were determined by morphological and optical studies supplemented by diffraction. While the fluoro and ethyl compounds preserve the complete layer structure of mHB, and the bromo and chloro compounds preserve most of its features, the methyl compound packs in a completely different structure. Unlike either of its pure components, the methyl/bromo solid solution packs in the mHB layer structure. Hydrogen bonding and herringbone packing do not overwhelmingly favor a constant layer motif. Competing influences due to size, charge, and O−H···X hydrogen bonding (X = Cl, Br) of substituents are discussed. For crystal design purposes it is important to identify unfavorable packing motifs, such as the side-by-side arrangement of parallel C−Cl or C−Br groups.

show abstract

“…He began his new series of publications with “Part III”, because he grouped 14 of his previous biochemical papers into what he considered Part I of the new series on melting points, and he designated his 1950 review on Newer Fatty Acids and Fats Part II. Sixteen years later (Figure ), he rounded out the second half of his research career with another, much longer, review on long‐chain compounds in the same journal . Only three of its 66 pages had any relevance to biological function, but it summarized painstakingly accurate melting points for 1189 long‐chain compounds in 80 series prepared in high purity in his own institute, and another 127 compounds in 14 series from other laboratories.…”

Section: Introductionmentioning

confidence: 99%

Understanding Long‐Chain Melting Points, Fritz Breusch, and Interface Thermodynamics

McBride

Bertman

2017

Israel Journal of Chemistry

View full text Add to dashboard Cite

Ah omologouslyi somorphous series of compounds can allow determinationo fl ocal contributions to crystal properties. Historically,m elting points have contributed little to structuralt heory,b ut those of as eries of longchain diacylp eroxides allow the measurement of localized structural contributions to solid-state thermodynamics, and demonstrate that ab romines ubstituent at al amellar interface can make negative contributions to both the enthalpy and entropy of fusion, thus acting more "liquid-like" when in the crystal than when in the melt. We discuss how Istanbul, and opposition to Hitler, led FriedrichB reusch and his studentst om easure at least 1242 accurate melting points, and how this legacy may prove valuable in understanding crystalline solids, especially those that show odd-even melting-point alternation.Keywords: Friedrich Breusch · history of science · interfaces · isomorphism · odd-even melting-point alternation[a] J.

show abstract

Homologe und isomere Reihen

Cited by 26 publications

References 54 publications

Remarkable reversal of melting point alternation by co-crystallization

Remarkable reversal of melting point alternation by co-crystallization

Using Hydrogen-Bonds and Herringbone Packing to Design Interfaces of 4,4‘-Disubstituted meso-Hydrobenzoin Crystals. The Importance of Recognizing Unfavorable Packing Motifs

Understanding Long‐Chain Melting Points, Fritz Breusch, and Interface Thermodynamics

Contact Info

Product

Resources

About