Jacobus Henricus van 't Hoff


Jacobus Henricus van 't Hoff

Infobox Scientist
name = Jacobus Henricus van 't Hoff


image_size = 180px
caption = Jacobus Henricus van 't Hoff
birth_date = August 30, 1852
birth_place = Rotterdam, Netherlands
residence = Netherlands
German Empire,
nationality = Netherlands
death_date = death date and age| 1911|3|1|1852|8|30
death_place = Steglitz, Berlin, Germany
field = Physical chemistry
Organic chemistry
work_institution = Veterinary College in Utrecht
University of Amsterdam
University of Berlin
alma_mater = Delft Polytechnic Institute
University of Leiden
University of Bonn
University of Paris
University of Utrecht
doctoral_advisor = Charles-Adolphe Wurtz
Friedrich Kekulé
doctoral_students =
known_for = Chemical kinetics, Stereochemistry
prizes = Nobel Prize for Chemistry (1901)

Jacobus Henricus van 't Hoff (August 30, 1852 – March 1, 1911) was a Dutch physical and organic chemist and the winner of the inaugural Nobel Prize in chemistry. His research on chemical kinetics, chemical equilibrium, osmotic pressure and crystallography is credited to be his major work. Van 't Hoff helped to found the discipline of physical chemistry as we know it today.

Biography

He was born in Rotterdam, Netherlands, the son of a medical doctor. From a young age he was interested in science and nature; he frequently took part in botanical excursions, and his receptiveness for philosophy and his predilection for poetry were already apparent in his early school years. (Lord Byron was his idol.)Against the wishes of his father, he went to study chemistry, first at the Delft Polytechnic Institute, then at the University of Leiden, then to Bonn, Germany (where he studied with Friedrich Kekulé), then Paris (where he studied with C. A. Wurtz), finally receiving his doctorate at the University of Utrecht in 1874.In 1878 van 't Hoff married Johanna Francina Mees. They had two daughters, Johanna Francina (b. 1880) and Aleida Jacoba (b. 1882), and two sons, Jacobus Hendricus (b. 1883) and Govert Jacob (b. 1889).

Career

Contributions to chemistry

Before receiving his doctorate, van 't Hoff had already published the first of his important contributions to organic chemistry. In 1874 he accounted for the phenomenon of optical activity by assuming that the chemical bonds between carbon atoms and their neighbors were directed towards the corners of a regular tetrahedron. This three-dimensional structure perfectly accounted for the isomers found in nature (stereochemistry). He shares credit for this idea with the French chemist Joseph Le Bel, who independently came up with the same idea.

Van 't Hoff published his work on the geometry of science in his book "La chimie dans l'éspace" in 1874. At the time, his theory was considered an extraordinary claim in science, and was criticized strongly by the scientific community. One such critic was the renown editor of the German "Journal für praktische Chemie", Adolf Kolbe, who stated:

"A Dr. H. van ’t Hoff of the Veterinary School at Utrecht has no liking, apparently, for exact chemical investigation. He has considered it more comfortable to mount Pegasus (apparently borrowed from the Veterinary School) and to proclaim in his "‘La chimie dans l’espace’" how the atoms appear to him to be arranged in space, when he is on the chemical Mt. Parnassus which he has reached by bold fly."

However, van 't Hoff's work was revolutionary, and became indispensable in science.

In 1884 van 't Hoff published his research on chemical kinetics, naming it "Études de Dynamique chimique" ("Studies in Chemical Dynamics"), in which he described a new method for determining the order of a reaction using graphics, and applied the laws of thermodynamics to chemical equilibria. He also introduced the modern concept of chemical affinity. In 1886 he showed a similarity between the behaviour of dilute solutions and gases. Until 1895 he worked on Svante Arrhenius's theory of the dissociation of electrolytes. On 1896 he became professor to the "Prussian Academy of Science" at Berlin. His studies of the salt deposits at Stassfurt contributed to Prussia's chemical industry. In 1887 he and German chemist Wilhelm Ostwald founded an influential scientific magazine named "Zeitschrift für physikalische Chemie" "("Journal of Physical Chemistry")".

The Nobel Prize in Chemistry

Van 't Hoff became a lecturer in chemistry and physics at the Veterinary College in Utrecht. He then became a professor of chemistry, mineralogy, and geology at the University of Amsterdam for almost 18 years before eventually becoming the chairman of the chemistry department. In 1896 van 't Hoff moved to Germany where he finished his career at the University of Berlin in 1911. In 1901 he received the first Nobel Prize in chemistry for his work with solutions. This can generally be summarized by stating that very dilute solutions follow mathematical laws that closely resemble the laws describing the behavior of gases.

Honours and awards

In 1885 he was appointed member of the Royal Netherlands Academy of Sciences. Other distinctions included the honorary doctorates of Harvard and Yale 1901, Victoria University, Manchester 1903, Heidelberg 1908; the Davy Medal of the Royal Society 1893 (along with Le Bel), Helmholtz Medal of the Prussian Academy of Sciences 1911; he was also appointed Chevalier de la Légion d'honneur 1894, Senator der Kaiser-Wilhelm-Gesellschaft (1911). Van 't Hoff was also honorary member of the British Chemical Society in London, the Royal Academy of Sciences, in Göttingen 1892, American Chemical Society 1898, and the Académie des Sciences, in Paris 1905.

He was indeed a prominent scientist of its time. Of his numerous distinctions, he regarded his winning of the first Nobel Prize in Chemistry as the culmination of his career.

Van 't Hoff died at the age of 58, on March 1, 1911, at Steglitz near Berlin from tuberculosis.

ee also

* van 't Hoff factor
* van 't Hoff equation

References

*cite journal | title=Jacobus Henricus van 't Hoff; Hundred Years of Impact on Stereochemistry in the Netherlands | author=E. W. Meijer | journal=Angewandte Chemie International Edition | volume=vol. 40 | issue=no. 20 | pages=3783 | year=2001 | doi=10.1002/1521-3773(20011015)40:20<3783::AID-ANIE3783>3.0.CO;2-J
*cite journal | title=Selling a Theory: The Role of Molecular Models in J. H. van 't Hoff's Stereochemistry Theory | author=Trienke M. van der Spek | journal=Annals of Science | volume=vol. 63 | issue=no. 2 | pages = 157 | year=2006 | doi=10.1080/00033790500480816
*cite journal | title=125 years of enantiomers: back to the roots Jacobus Henricus van 't Hoff 1852-1911
author=Kreuzfeld HJ, Hateley MJ. | journal=Enantiomer | volume=vol. 4 | issue=no. 6 | pages=pp. 491–6 | year=1999

Further Reading

*Patrick Coffey, Cathedrals of Science: The Personalities and Rivalries That Made Modern Chemistry, Oxford University Press, 2008. ISBN 978-0-19-532134-0

External links

* [http://nobelprize.org/nobel_prizes/chemistry/laureates/1901/hoff-lecture.html Nobel Lecture] "Osmotic Pressure and Chemical Equilibrium" from Nobelprize.org website
*

Persondata
NAME= Hoff, Jacobus Henricus van 't
ALTERNATIVE NAMES=
SHORT DESCRIPTION= Chemist and Nobel laureate
DATE OF BIRTH= August 30, 1852
PLACE OF BIRTH= Rotterdam, Netherlands
DATE OF DEATH= 1911-3-1
PLACE OF DEATH= Steglitz, Berlin, Germany


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