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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/981

Title: Two new inorganic–organic hybrid salts: [NH2Me2]4[NMe4]2- [Mo0.5O4c(Mo12O36)]·1.5H2O and [NMe4]2[NH4]2[Mo8O26]·2H2O
Authors: Duraisamy, T
Ramanan, A
Vittal, J J
Keywords: organic–inorganic hybrid
aqueous ammonium molybdate
tetramethylammonium ions
hydrazine hydrate
two water molecules
mixedvalent Keggin clusters
Issue Date: 1999
Citation: Journal of Materials Chemistry,9, 763–767
Abstract: The present paper reports the formation of two novel organic–inorganic hybrid structures from acidified, aqueous ammonium molybdate solution containing tetramethylammonium ions, [NH2Me2]4[NMe4]2[Mo0.5O45(Mo12O36)]·1.5H2O 1 and [NMe4]2[NH4]2[Mo8O26]·2H2O 2. While 1 is crystallised in the presence of a reducing agent, hydrazine hydrate, 2 is formed in its absence. Crystal data: 1, orthorhombic, space group Pnma, a=22.4037(2), b=19.5153(2) and c=12.7108(2) A° , V=5557.3(1) A° 3, Z=4; 2, monoclinic, space group C2/m, a=11.2641(1), b=16.3815(1), c=10.0775(1) A° , b=110.242(1)°, V= 1744.68(3) A° 3, Z=2. Compound 1 contains layers of disordered dimethylammonium ions alternating with mixedvalent Keggin clusters which are surrounded by tetramethylammonium cations. The structure of 2 is characterised by the presence of layers containing tetramethylammonium cations alternating with layers containing b-Mo8O26 anions; the cavity formed between the anionic clusters is occupied by an unusual eight-membered hydrogen bonded cluster formed between two ammonium ions and two water molecules.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/981
Appears in Collections:Chemistry

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