Molecular di- and tetra-nuclear zinc(II) phosphates with sterically hindered aryl phosphate mono esters ligands

Santra, Biswajit; Kumar, Vivek; Kalita, Pankaj; Gupta, Vivek; Mandal, Debdeep; Chandra, Amitava; Joshi, Mayank; Choudhury, Angshuman Roy; Jana, Anukul; Chandrasekhar, Vadapalli

doi:10.1016/j.poly.2019.06.016

Cited by 2 publications

(1 citation statement)

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“…Typically, they bind metal ions in a simple κ 1 fashion through the pyridinic N‐donor, leaving N−H groups available to interact with the H‐bond acceptor [10] . Using these types of systems as ancillary ligands in the synthesis of molecular metal phosphates resulted in the formation of mono‐, [11] di‐, [2d,8d,12] tetra‐, [9g,12a] hexa‐ and enneanuclear complexes [13] . This implies that pyrazole‐based ligand system aids in the formation of various molecular structures.…”

Section: Introductionmentioning

confidence: 99%

Nuclearity Control in Molecular Copper Phosphates Derived from a Bulky Arylphosphate: Synthesis, Structural and Magnetic Studies

Prapakaran

Sathish

et al. 2023

Eur J Inorg Chem

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Dedicated to Professor Dietmar Stalke on the occasion of his 65 th birthdayStarting from sterically encumbered 2,6-di-tert-butylphenyl phosphate (dtbppH 2 ) and co-ligand 3,5-dimethyl pyrazole (dmpz), it is possible to isolate either mono-, di-or tetranuclear copper phosphates by varying the copper source and making attendant changes in the reaction conditions. For example, reaction of copper nitrate with dtbppH 2 and dmpz at 60 °C leads to the isolation of the mononuclear copper phosphate [Cu(dtbppH) 2 (dmpz)(MeOH) 2 ] (1) as the only product. However, the use of copper acetate in place of copper nitrate and conducting the reaction at the room temperature leads to the formation of both dinuclear [Cu(dtbpp)(dmpz) 2 ] 2 (2) and tetranuclear [Cu 2 (dtbpp)(dmpz) 2 (OAc)(MeO)] 2 (3) from the same reaction mixture. Compounds 2 and 3 could be isolated in pure form through fractional crystallization. Copper phosphates 1-3 have been characterized by both analytical and spectroscopic methods including EPR and magnetic measurements. The molecular structures of all three compounds were established through single crystal diffraction studies. Dc magnetic measurements indicate antiferromagnetic interactions between the metal centres in all the compounds.

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