New Saccharinato/Ammonia Complexes of Nickel(II) and Zinc(II). A Structural and Spectroscopic Study

Abstract

Two new saccharinate/NH 3 complexes of composition [Ni(sac) 2 (NH 3 ) 4 ] and [Zn(sac) 2 (NH 3 ) 2 ] were obtained and their crystal structures determined by single crystal X-ray diffractometry. The elongated octahedral Ni II complex crystallizes in the monoclinic P2 1 /c space group with Z ϭ 2 whereas the tetrahedral Zn II complex is triclinic (space group P1 and Z ϭ 2). For [Ni(sac) 2 -619 (NH 3 ) 4 ] the magnetic moment and electron absorption spectrum were obtained and discussed. The infrared spectra of both complexes were also recorded and briefly commented.

Saccharin Anion Acts as a “Traffic Assistant” of Zn2+ to Achieve a Long-Life and Dendritic-Free Zinc Plate Anode

“…Sodium saccharin affects the ion deposition process by forming ion complexes, ion-pairing, and interacting with the substrate to block particular surface sites. 32 Thus, the addition of saccharin in the electrodeposition process of the metals Zn and Ni can guide a uniform deposition of metal ions, which reduces the stress of the coating, produces deposition products with smooth, fine grains and compact morphology, and finally greatly improves the corrosion resistance. 33 Lokhande et al and Singh et al reported that saccharin molecules would have characteristic adsorption on the electrode, with which the electrochemical activity was improved and corrosion was reduced.…”

“…The coordination chemistry of this sodium saccharin-dissociated anion is very interesting and versatile, considering that it has different coordination positions in the metal center. Sodium saccharin affects the ion deposition process by forming ion complexes, ion-pairing, and interacting with the substrate to block particular surface sites . Thus, the addition of saccharin in the electrodeposition process of the metals Zn and Ni can guide a uniform deposition of metal ions, which reduces the stress of the coating, produces deposition products with smooth, fine grains and compact morphology, and finally greatly improves the corrosion resistance .…”

SERS Examination of Saccharin Adsorption on Ni Electrodes

“…Specifically, saccharinate is coordinated by either N-monodentate or O-monodentate with nickel. [19][20][21] Of these, the N-bound form is more common; the O-bound complex through the carbonyl oxygen is unusual and is found when branched or bulky coligands are present. 16 The structures adopted by saccharin on metal electrode surfaces have been examined using scanning tunnel microscopy ͑STM͒.…”