Synthesis and spectral characterization of novel compounds derived from 1,10-phenanthroline, lead(II) and tetrabutylammonium tetrafluoroborate

Second sphere interaction in fluoroanion binding: Synthesis, spectroscopic and X-ray structural study of trans-dichlorobis(ethylenediamine) cobalt(III) terafluoroborate

“…1) there is strong peak at 1051 cm À1 with small shoulders at 1114 and 1003 cm À1 which were assigned to the degenerate stretching mode, n d for BF 4 À ion, while the very strong band at 522 cm À1 corresponded to the degenerate deformation mode (d d, BF 4 À ). These values are also in agreement with those tetra-butylammonium tetrafluoroborate, Bu 4 N.BF 4 [15]. The cation belongs to near D 2 H symmetry due to which the IR band at 473 cm À1 is assigned to asymmetric stretching of Co-N while symmetric Co-N stretch is IR inactive.…”

Second sphere coordination in anion binding: Synthesis, spectroscopic characterization and single crystal X-ray structure determination of hexaamminecobalt(III) dichloride tetrafluoroborate

“…1) there is a strong peak at 1047 cm À1 with the small shoulders at 1153, 1116 and 1005 cm À1 which were assigned to the degenerate stretching mode, n d for BF 4 À ion, while the very strong band at 522 cm À1 corresponds to the degenerate deformation mode (d d , BF 4 À ). These values are also in agreement with tetra-butylammonium tetrafluoroborate, Bu 4 NÁBF 4 [26].…”

Stabilization of tetrameric metavanadate ion by tris(1,10-phenanthroline)cobalt(III): synthesis, spectroscopic, and X-ray structural study of [Co(phen)3]3(V4O12)2Cl · 27H2O

“…Therefore, two electronic transitions 1 A 1g → 1 T 1g and 1 A 1g → 1 T 2g are reported for familiar orange–yellow color for coordination compounds containing Co(III) which were observed around 340 and 470 nm. 1,10-Phenanthroline is also coordinated to Co(III) and transitions around 224, 264, 290 nm arise from phen [34, 37, 38]. The electronic spectrum of the title complex salt in water show absorption maxima (λ max ) at 219, 273, 280, 349 and 456 nm, close to reported values.…”

“…The peak assignments have been made in consultation with literature values [34-36]. IR spectral bands at 1634-1582, 3340 and 488 cm -1 were assigned to ν(C=C)/ν(C=N), ν(O-H) of H 2 O and ν(Co-N).…”