Biography & contributions
Johann Josef Loschmidt was born on March 15, 1821
Loschmidt was a pioneer of 19th-century physics and chemistry
He symbolized the benzene nucleus by a large circle and of many aromatic chemicals
In 1865 Loschmidt estimate the size of the molecules that make up the air
He given first representation of
- Allyl moieties
- Vinyl moieties
- Cyclopropane
Loschmidt mentioned double- and triple-bond marks
He is the first realistic displays of atomic sizes and bond distances (largest overlap with triple bonds)
Loschmidt given set of diagrams with correct C=12, N=14, O=16 formulas
He had given first line-formula notations - rational formulas
Loschmidt explained revelation of hexavalent and tetravalent sulfur
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