Effective synthesis of hexacoordinate silicates of 2,3-dihydroxynaphthalene under microwave condition and X-ray crystal structure of bis(tri-n- butylammonium)tris(2,3-dihydioxynaphthalato)silicate

The synthesis of tris(2,3-dihydroxynaphthalato)silicate with different ammonium counter cations has been achieved both by conventional method and under microwave conditions using tetraethoxysilane. The compounds have been characterized using elemental analysis, IR, NMR (1H, 13C and 29Si), and MALDI-TOF-MS techniques. Single crystal X-ray structure of [(n-C4H9)3NH)2] [Si(C10H6O2)3] reveals a distorted octahedral geometry around silicon and only discrete hydrogen bonding interaction between the ion pairs.