[7] Her thesis defense was held in the main hall of the university and was attended by many young women of the city, interested in seeing "Unser erster weiblicher Doktor" ("our first female doctor").

[9][10] The two had met years earlier at a dance lesson and started a brief romance, but Immerwahr turned down his marriage proposal at the time because she wanted to remain financially independent.

[5] In a 1915 letter to Setsuro Tamaru, a Japanese colleague of Haber's, Immerwahr expressed her disappointment that her husband worked "18 hours a day, almost always in Berlin (not in Dahlem!

)"[15] During World War I, Fritz Haber became a staunch supporter of the German military effort and played an important role in the development of chemical weapons (particularly poison gases).

Immerwahr reportedly spoke out against her husband's research as a "perversion of the ideals of science" and "a sign of barbarity, corrupting the very discipline which ought to bring new insights into life.

Six days after her death, only the small local newspaper Grunewald-Zeitung reported that "the wife of Dr H. in Dahlem, who is currently on the front, has set an end to her life by shooting herself.

[23] The Habers also feature prominently in the novel A Reunion of Ghosts by Judith Claire Mitchell, where their characters are named Lenz and Iris Alter.

[24] Works such as The Greater Good (2008), directed by Celia de Wolff and written by Justin Hopper, portray Clara as deeply affected by her husband's research on gas warfare.