𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Die kristallstruktur von oligo[(2-hydroxy-1,3-phenylen)methylen]en

✍ Scribed by Paulus, Erich ;Böhmer, Volker


Publisher
Wiley (John Wiley & Sons)
Year
1984
Weight
677 KB
Volume
185
Category
Article
ISSN
0025-116X

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

The crystal structure of three tetranuclear phenolic compounds – 6,6′‐bis (2‐hydroxy‐5‐methylbenzyl)‐4,4′‐dimethyl‐2,2′‐methylenediphenol (1), 6‐(2‐hydroxy‐3,5‐dimethylbenzyl)‐6′‐(2‐hydroxy‐5‐methylbenzyl)‐4,4′‐dimethyl‐2,2′‐methylendiphenol (2), and 6‐(3‐tert‐butyl‐2‐hydroxy‐5‐methylbenzyl)‐6′‐(2‐hydroxy‐5‐methylbenzyl)‐4,4′‐dimethyl‐2,2′‐methylene‐diphenol (3) –, was determined by single crystal X‐ray analysis. Intramolecular hydrogen bonds between all hydroxyl groups of adjacent phenolic units are found for all molecules. They are directed to the opposite end of the molecule by the ortho‐methyl or ortho‐tert‐butyl group in compounds 2 and 3, while no special orientation is found in 1. The conformation of the phenolic units is trans/trans (anti/anti) in 1 and cis/trans (syn/anti) in 2 and 3. Consequently, in the crystal lattice, 2 and 3 form cyclic dimers via intermolecular head‐to‐tail hydrogen bonds, while the molecules of 1 are arranged to chains of indefinite length by head‐to‐head and tail‐to‐tail hydrogen bonds.


📜 SIMILAR VOLUMES


Darstellung von Oligo[(hydroxy-1,3-pheny
✍ Böhmer, Volker ;Lotz, Werner ;Pachta, Jiri ;Tütüncü, Suat 📂 Article 📅 1981 🏛 Wiley (John Wiley & Sons) ⚖ 744 KB

## Abstract Possibilities to synthesize substituted oligo[(hydroxy‐1,3‐phenylene)methylene]s containing hydroxynitrophenylene and alkylhydroxyphenylene units are discussed. The only successful way to introduce the hydroxynitrophenylene unit consists in the condensation of chloromethylated nitrophen

Spektroskopische analyse mehrfacher meth
✍ Kämmerer, Hermann ;Pachta, Jiri ;Ritz, Jürgen 📂 Article 📅 1977 🏛 Wiley (John Wiley & Sons) ⚖ 627 KB

## Abstract The structures of two homologous series of oligo[(2‐hydroxy‐1,3‐phenylene)methylene]s completely esterified with methacrylic acid, were spectroscopically analysed. The molar decadal absorption coefficients of ultraviolet absorption maxima of the two homologous series confirm Hunter's re

1H NMR-spektroskopische Untersuchungen z
✍ Deveaux, Jürgen ;Böhmer, Volker 📂 Article 📅 1976 🏛 Wiley (John Wiley & Sons) ⚖ 560 KB

## Abstract Die ^1^H NMR‐Spektren von 51 Oligo(hydroxy‐5‐nitro‐1,3‐phenylen)methylen Verbindungen (17 Zwei‐, 18 Drei‐, 14 Vier‐ und 2 Fünfkernverbindungen) wurden in Pyridin als Lösungsmittel aufgenommen. Bei Verbindungen mit __ortho__‐Nitrophenolbausteinen zeigten die Signale für die Protonen der

Darstellung einiger oligomerer Cyclo{oli
✍ Happel, Günter ;Mathiasch, Bernd ;Kämmerer, Hermann 📂 Article 📅 1975 🏛 Wiley (John Wiley & Sons) ⚖ 753 KB

## Abstract Es wird die Darstellung von Cyclo{tris[(2‐hydroxy‐5‐methyl‐1,3‐phenylen)methylen]‐(2‐hydroxy‐5‐__tert__‐butyl‐1,3‐phenylen)methylen} (**4a**), Cyclo{bis[(2‐hydroxy‐5‐methyl‐1,3‐phenylen)methylen]‐bis[(2‐hydroxy‐5‐__tert__‐butyl‐1,3‐phenylen)methylen]}(**4b**) und Cyclo‐{pentakis[(2‐hydr

Darstellung und spektroskopische analyse
✍ Kämmerer, Hermann ;Eberle, Klaus ;Böhmer, Volker ;Großmann, Max 📂 Article 📅 1975 🏛 Wiley (John Wiley & Sons) ⚖ 980 KB

## Abstract 4‐(1,1,3,3‐Tetramethylbutyl)phenol und 4‐Octylphenol, erhalten durch Friessche Verschiebung der entsprechenden Phenylester und anschließende Reduktion der Carbonylgruppe, wurden in ortho‐Stellung monobromiert und mit Formaldehyd hydroxymethyliert. Aus diesen Verbindungen konnten sechs 2