Karl-Friedrich Bonhoeffer
May 1928 at Munich
Born	13 January 1899 Breslau, German Empire
Died	15 May 1957(1957-05-15) (aged 58) Göttingen, West Germany
Nationality	German
Alma mater	University of Tübingen, University of Berlin
Known for	Spin isomers of hydrogen: orthohydrogen and parahydrogen
Children	Friedrich Bonhoeffer
Scientific career
Institutions	Kaiser-Wilhelm-Institut for Physical and Electrochemistry, University of Leipzig, University of Berlin, Max Planck Institute for Biophysical Chemistry
Doctoral advisor	Walther Nernst, Fritz Haber
Doctoral students	Heinz Gerischer Albert Neuberger Ladislaus Farkas

Karl-Friedrich Bonhoeffer (13 January 1899 – 15 May 1957) was a German chemist.^[1]

Education and career[edit]

Born in Breslau, he was an older brother of martyred theologian Dietrich Bonhoeffer. His father was neurologist Karl Bonhoeffer and his mother was Paula von Hase.

Bonhoeffer studied from 1918 in Tübingen and Berlin, finishing his PhD in 1922 in Berlin with Walther Nernst. From 1923 to 1930 he was an assistant with Fritz Haber at Kaiser Wilhelm Institute for Physical Chemistry and Elektrochemistry in Berlin Dahlem. After the Habilitation in 1927, he became full professor at the University of Berlin. In 1930, Bonhoeffer was appointed a professor of Physical Chemistry at the University of Frankfurt. Four years later, he was appointed a professor of Physical Chemistry at the University of Leipzig. He became a professor for physical chemistry at the University of Berlin in 1947. Bonhoeffer was also director of the Kaiser Wilhelm Institute for physical and electrochemistry (now the Fritz Haber Institute of the MPG).^[2]

In 1949, he was appointed director of the Max Planck Institute for Physical Chemistry in Göttingen. The institute was restructured long after his death in 1971 and is now the Max Planck Institute for Biophysical Chemistry in Göttingen, also known as the Karl-Friedrich Bonhoeffer Institute.

Research[edit]

In 1929 Bonhoeffer, together with Paul Harteck, discovered the spin isomers of hydrogen, orthohydrogen and parahydrogen.^[3]

He died in Göttingen in 1957 at the age of 58.

References[edit]