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Title: Reversible hydration of tetraaquabis(4-aminobenzoato)cobalt(II)
Authors: Dhavskar, Kiran T
Srinivasan, Bikshandarkoil R
Keywords: Chromotropism;Crystal-to-amorphous transformations;Dehydration;Rehydration;Reversible hydration;Cobalt;4-Aminobenzoate
Issue Date: 10-Jul-2015
Publisher: NISCAIR-CSIR, India
Abstract: The octahedral red complex tetraaquabis(4-amino-benzoato)cobalt(II) (1) exhibits a water induced crystalline- amorphous-crystalline transformation accompanied by chromotropism. The loss of coordinated water from [Co(4-aba)2(H2O)4]  (1)  (4-aba=4-aminobenzoate) on heating, leads to the formation of tetrahedral anhydrous [Co(4-aba)2] (2). The amorphous blue compound (2) can be rehydrated to original composition by equilibrating (2) over water vapour. The rehydrated crystalline compound exhibits properties identical with (1). The variation in the structure and properties of (1) due to the coordination and decoordination of water are studied by spectral, thermal, magnetic and conductivity measurements.
Page(s): 867-871
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.54A(07) [July 2015]

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