The discovery of molecular magnet by Bhagawati Charan Guha is not well-discussed in the history of Indian science. On studying a series of inorganic crystals, Guha found some anomalous magnetic behaviour of copper(II) acetate which was not structurally characterized then. After the discovery of the structure, copper(II) acetate appeared as a dimeric dihydrate molecule rather than an inorganic solid. Guha then put a structure-function correlation between the newly discovered structure of copper(II) acetate and its lowtemperature magnetic data. This dimeric copper(II) acetate dihydrate is now regarded as the first reported molecular magnet.
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