Mendeleev was credited as being the creator of the first version of the periodic table of elements.

in the 1860s, Mendeleev was unaware of the other work on periodic tables going on in the 1860s.

in 1869, Mendeleev was one of the founders of the Russian Chemical Society.

Mendeleev proposed to Anna Ivanova Popova and threatened to kill himself if she refused.

Mendeleev became obsessed with Anna Ivanova Popova and began courting her in 1876.  

Mendeleev was married twice, He got engaged on April 4,1862 then he got married on April 27,1862 and then he divorced his wife because he was seeing another woman.

In 1863, Mendeleev became Professor of Chemistry at the Saint Petersburg Technological Institute and Saint-Petersburg state university