Silver Melonates and Coordination Modes of the Multidentate [C6N7(NCN)3]3– Anion

✍ Scribed by Corinna Clauss; Uwe Böhme; Anke Schwarzer; Edwin Kroke

• Publisher: John Wiley and Sons
• Year: 2012
• Tongue: English
• Weight: 730 KB
• Volume: 2012
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.201101254

✦ Synopsis

Three different silver melonates, Ag 3 [C 6 N 7 (NCN) 3 ]•H 2 O (2a), Ag 3 [C 6 N 7 (NCN) 3 ]•0.5NH 3 (2b) and Ag 3 [C 6 N 7 (NCN) 3 ]• 2C 2 H 8 N 2 (2c), and a nickel melonate, Ni 3 [C 6 N 7 (NCN) 3 ] 2 • 10NH 3 •6H 2 O (3), have been synthesised by the reaction of potassium melonate with silver nitrate either in an aqueous solution (2a), aqueous ammonia solution (2b) or an aqueous solution of ethylenediamine (2c) and with nickel nitrate in an aqueous ammonia solution (3). The crystal structure of 2c was determined by XRD [triclinic, P1 ¯, a = 7.5499(4), b = 11.3438(6), c = 12.5741(7) Å, α = 72.138(4), β = 80.148(4), γ = 75.945(4)°, V = 984.90(9) Å 3 ]. Silver atoms are coordinated to the terminal nitrogen atom of the cyanamide substituent as well as directly to the N atoms of the s-heptazine core. Complex 2c crystallises in a layered structure. Adjacent Ag-melonate cation-anion units are connected by Ag-Ag interactions. The preferred coordination mode of metal ions at the