Note about Cholesterol
A translation from German of the original paper by Prof. Planer in which he describes his observations of selective light reflection in monotropic cholesteric liquid crystal phase of cholesteryl chloride that he synthesized. Translation by Peter Oelschlaeger, Chemistry Department and Center for Macr...
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Інститут фізики конденсованих систем НАН України
2010
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| Zitieren: | Note about Cholesterol / J. Planer // Condensed Matter Physics. — 2010. — Т. 13, № 3. — С. 37001:1-2. — англ. |
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Planer, J. 2012-04-08T19:31:56Z 2012-04-08T19:31:56Z 2010 Note about Cholesterol / J. Planer // Condensed Matter Physics. — 2010. — Т. 13, № 3. — С. 37001:1-2. — англ. 1607-324X PACS: 61.30.-v, 64.70.pv, 82.70.Dd https://nasplib.isofts.kiev.ua/handle/123456789/32112 A translation from German of the original paper by Prof. Planer in which he describes his observations of selective light reflection in monotropic cholesteric liquid crystal phase of cholesteryl chloride that he synthesized. Translation by Peter Oelschlaeger, Chemistry Department and Center for Macromolecular Modeling and Material Design and by Hector Cordova Mireles, Department of Physics, both from the California State Polytechnic University at Pomona. Translation was slightly revised by Prof. H.S. Kitzerow, Department of Chemistry from the University of Paderborn in Germany. Reproduced with the permission of Willey-VCH Verlag GmbH & Co. KGaA. Наведено переклад з німецької оригінальної статті проф. Планера, в якій він описує вибіркове відбивання світла в синтезованій ним монотропній рідкокристалічній фазі хлориду холестеролу. Переклад зроблено П. Оелшлагером та Г. Кордова-Моралесом із Каліфорнійського університету в Помоні та підкореговано проф. Кітзеровим із Падеборнського університету в Німеччині. Публікується з дозволу Willey-VCH Verlag GmbH і Co. KGaA. Originally published in German in "Mittheilungen aus dem Universit ¨atslaboratorium in Lemberg", Annalen der Chemie und Pharmacie (Annals of Chemistry and Pharmacy), Band CXVIII, Bandes erstes Heft (Issue 1), 25 27, 1861. Copyright Willey-VCH Verlag GmbH & Co. KGaA en Інститут фізики конденсованих систем НАН України Condensed Matter Physics Rapid Communication Note about Cholesterol Замітка про холестерол Article published earlier |
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Note about Cholesterol |
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Note about Cholesterol Planer, J. Rapid Communication |
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Note about Cholesterol |
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Note about Cholesterol |
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Note about Cholesterol |
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Note about Cholesterol |
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note about cholesterol |
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Planer, J. |
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Planer, J. |
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Condensed Matter Physics |
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Інститут фізики конденсованих систем НАН України |
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Article |
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Замітка про холестерол |
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A translation from German of the original paper by Prof. Planer in which he describes his observations of selective light reflection in monotropic cholesteric liquid crystal phase of cholesteryl chloride that he synthesized. Translation by Peter Oelschlaeger, Chemistry Department and Center for Macromolecular Modeling and Material Design and by Hector Cordova Mireles, Department of Physics, both from the California State Polytechnic University at Pomona. Translation was slightly revised by Prof. H.S. Kitzerow, Department of Chemistry from the University of Paderborn in Germany. Reproduced with the permission of Willey-VCH Verlag GmbH & Co. KGaA.
Наведено переклад з німецької оригінальної статті проф. Планера, в якій він описує вибіркове відбивання світла в синтезованій ним монотропній рідкокристалічній фазі хлориду холестеролу. Переклад зроблено П. Оелшлагером та Г. Кордова-Моралесом із Каліфорнійського університету в Помоні та підкореговано проф. Кітзеровим із Падеборнського університету в Німеччині. Публікується з дозволу Willey-VCH Verlag GmbH і Co. KGaA.
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1607-324X |
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https://nasplib.isofts.kiev.ua/handle/123456789/32112 |
| citation_txt |
Note about Cholesterol / J. Planer // Condensed Matter Physics. — 2010. — Т. 13, № 3. — С. 37001:1-2. — англ. |
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2025-11-24T05:25:00Z |
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| _version_ |
1850842535420755968 |
| fulltext |
Condensed Matter Physics 2010, Vol. 13, No 3, 37001: 1–2
http://www.icmp.lviv.ua/journal
Note about Cholesterol
J. Planer
Originally published in German in “Mittheilungen aus dem Universitätslaboratorium in Lemberg”∗,
Annalen der Chemie und Pharmacie (Annals of Chemistry and Pharmacy), Band CXVIII,
Bandes erstes Heft (Issue 1), 25–27, 1861. Copyright Willey-VCH Verlag GmbH & Co. KGaA
Translation received June 1, 2010
A translation from German of the original paper by Prof. Planer in which he describes his observations of se-
lective light reflection in monotropic cholesteric liquid crystal phase of cholesteryl chloride that he synthesized.
Translation by Peter Oelschlaeger, Chemistry Department and Center for Macromolecular Modeling and Mate-
rial Design and by Hector Cordova Mireles, Department of Physics, both from the California State Polytechnic
University at Pomona. Translation was slightly revised by Prof. H.S. Kitzerow, Department of Chemistry from
the University of Paderborn in Germany. Reproduced with the permission of Willey-VCH Verlag GmbH & Co.
KGaA.
Key words: cholesteryl chloride, monotropic cholesteric liquid crystal phase
PACS: 61.30.-v, 64.70.pv, 82.70.Dd
The significance that cholesterol gains for the physiologist due to its presence in the animal
organism and namely due to its constant appearance in all regressive metamorphoses of animal
tissue, moved me a while ago to conduct experiments on this body substance, namely in order to
liberate it from its isolated position in the chemical system and to thereby possibly obtain clues
for the judgment of its role in the animal body.
The guidance for the direction of the experiments for me to conduct seemed to lie in the com-
ment by Gerhardt: “After the composition of these hydrocarbons (cholesterol and cholesterone),
cholesterol seems to be an alcohol” [original in French] (Traite de chim. org. par Gerhardt III, 739.)
∗At present Lviv, Ukraine.
c© J. Planer 37001-1
http://www.icmp.lviv.ua/journal
J. Planer
Following the advice of Prof. Pebal, I let phosphorus trichloride act on cholesterol, by which I
obtained a chlorine compound of cholesterol, which I wanted to use to synthesize other derivatives
of the alcohols of analogous compounds of cholesterol. While I was working at these experiments,
Berthelot’s note appeared in the Compt. rend. 47: “About several new alcohols”, after which I
stopped the continuation of my experiments.
However, from the detailed work of Berthelot, which appeared in Ann. ch. phys. 112, 356, I
see that the chlorine cholesteryl synthesized in my way is a very different compound than the
one that Berthelot obtained by heating hydrochloric acid and cholesterol in a fused tube, which he
describes as a non-crystalizable, transparent, resinlike substance, whose chlorine content constantly
decreases. This prompts me to call attention to the cholesteryl prepared by me, namely because
this compound is quite suitable for the exact determination of the formula of cholesterol and could
probably also successfully be used as a starting point for the synthesis of other compounds of this
body substance.
The action of phosphorous trichloride already proceeds quite actively at room temperature; one
obtains a brown, viscous substance, which soon solidifies in crystals and which can easily be purified
by squeezing, repeated boiling in water and recrystallization in ether/alcohol. At slow crystalliza-
tion from alcohol chlorocholesteryl forms long needle-shaped crystals, at slow crystallization from
ether ether/alcohol a crumby crystal paste; those dissolve easily in ether and hardly in wine spirit,
contain no crystal water, melt roughly at the boiling point of water; during the cooling process, the
molten substance exhibits a lively violet color in incident light, a yellow-green color in transmitted
light; when cooling is complete, it adopts a crystalline consistency again. The compound is very
hard to decompose; even boiling in concentrated caustic potash does not change it.
Since the preliminary analyses of the substance of different preparations yielded numbers, from
which the constant composition of the substance emerges, I am presenting these here. The com-
bustions were done with chrome acidic lead, for the chlorine determination the substance was
destroyed with potash lime.
I. 0.439 substance gave 1.287 CO2 and 0.4425 HO.
II. 0.448 (of another preparation) 1.308 CO2 and 0.4505 HO.
III. 0.540 substance yielded 0.1904 AgCl.
IV. 0.613 substance yielded 0.2122 AgCl.
From the obtained numbers the calculated numbers for 100 parts are:
I. II. III. IV. calculated
C 79.95 79.62 – – C32 79.89
H 11.19 11.17 – – H43 11.01
Cl – – 8.71 8.55 Cl 9.09
Замiтка про холестерол
Ю. Планер
Оригiнал статтi був опублiкований нiмецькою мовою у “Доповiдях з унiверситетських лабораторiй у
Лемберзi”, Annalen der Chemie und Pharmacie, том. 118, вип. 1, ст. 25–27, 1861.
Переклад з нiмецької оригiнальної статтi проф. Планера, в якiй вiн описує вибiркове вiдбивання
свiтла в синтезованiй ним монотропнiй рiдкокристалiчнiй фазi хлориду холистеролу. Переклад зро-
блено Пiтером Оелшлагером та Гектором Кордова-Моралесом з Калiфорнiйського унiверситету в
Помонi. Переклад був пiдкорегований професором Кiтзеровим з Падеборнського унiверситету в
Нiмеччинi. Публiкується з дозволу Willey-VCH Verlag GmbH & Co. KGaA.
Ключовi слова: хлорид холестерилу, монотропна холестерична рiдкокристалiчна фаза
37001-2
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