Hans-Werner Wanzlick
Encyclopedia
Hans-Werner Wanzlick was a professor of chemistry
at the Berlin Technical University. He is notable for work on persistent carbene
s and for proposing the Wanzlick equilibrium
between saturated imidazolin-2-ylidenes
and their dimers — which he called "das doppelte Lottchen", after a 1949 novel
by Erich Kästner
about a pair of mischievous twins.
Chemistry
Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds....
at the Berlin Technical University. He is notable for work on persistent carbene
Persistent carbene
A persistent carbene is a type of carbene demonstrating particular stability. The best-known examples are diaminocarbenes with the general formula 2C:, where the 'R's are various functional groups...
s and for proposing the Wanzlick equilibrium
Wanzlick equilibrium
The Wanzlick equilibrium is a chemical equilibrium between a relatively stable carbene compound and its dimer.-Original conjecture:In 1960, H.-W. Wanzlick and E...
between saturated imidazolin-2-ylidenes
Dihydroimidazol-2-ylidene
Dihydroimidazol-2-ylidene is a hypothetical organic compound with formula C3H6N2. It would be a heterocyclic compound, formally derived from imidazolidine with two hydrogen atoms removed from carbon number 2, leaving two vacant chemical bonds — which makes it a carbene.Although carbenes in general...
and their dimers — which he called "das doppelte Lottchen", after a 1949 novel
Lottie and Lisa
Lisa and Lottie is a 1949 novel by Erich Kästner, which originally started out during WWII as an aborted movie scenario, about twin girls separated at birth who meet at summer camp. It has been adapted into film many times .-Plot summary:Two nine-year-old girls—rude Lisa Palfy Lisa and...
by Erich Kästner
Erich Kästner
Emil Erich Kästner was a German author, poet, screenwriter and satirist, known for his humorous, socially astute poetry and children's literature.-Dresden 1899–1919:...
about a pair of mischievous twins.