A 30-Membered Nonanuclear Cobalt(II) Macrocycle Containing Phosphonate-Bridged Trinuclear Subunits
journal contributionposted on 04.06.2014 by Dipankar Sahoo, Ramakirushnan Suriyanarayanan, Vadapalli Chandrasekhar
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The reaction of Co(ClO4)2·6H2O with (trichloromethyl)phosphonic acid and 3,5-dimethyl-1H-pyrazole in a 3:1:6 ratio in the presence of triethylamine afforded [Co9(3,5-DMPz)12(3,5-DMPzH)6(Cl3CPO3)3](toluene)7 (1). The latter contains three trinuclear (Co3) subunits which are linked to each other by three bridging phosphonate ligands affording a 30-membered macrocycle. 1 contains an equilateral triangle comprising the phosphorus atoms of the bridging phosphonate groups. In solution, 1 breaks down into the trinuclear subunits as detected by electrospray ionization mass spectrometry.