Synthesis, characterization and crystal structure determination of iron(III) hetero-ligand complexes containing 2,2′-bipyridine, 5,5′-dimethyl-2,2′-bipyridine and chloride, [Fe(bipy)Cl4][bipy·H] and [Fe(dmbipy)2Cl2][FeCl4]

Synthesis, characterization, and crystal structural study of the iron(II) 4,4′-bithiazole complex [Fe(C6H4N2S2)3]2+(NO3 −)2

“…These several bands for the free ligand are shifted to higher frequencies upon coordination in complex 1 [19,[27][28][29][30]. This shift to higher frequencies upon coordination to metal has been observed for bipyridine and 2,2 0 -dimethyl-4,4 0 -bithiazole ligands coordinated to metals as well [19,[27][28][29][30], and can be explained by changing the geometry of the free ligand from syn to anti orientation in the coordinated case. The bands observed near 3,070 cm -1 can be assigned to m(C-H) vibrations for 4,4 0 -bit and 1.…”

“…1) contain several bands in the region 600-3,130 cm -1 , which are related to the heteroaromatic ring modes related to C-H, C=C, C=N, C-C, C-N, and S-C [19,25,26]. These several bands for the free ligand are shifted to higher frequencies upon coordination in complex 1 [19,[27][28][29][30]. This shift to higher frequencies upon coordination to metal has been observed for bipyridine and 2,2 0 -dimethyl-4,4 0 -bithiazole ligands coordinated to metals as well [19,[27][28][29][30], and can be explained by changing the geometry of the free ligand from syn to anti orientation in the coordinated case.…”

“…The Fe-N average bond distances in high-spin iron(II) and (III) phenanthroline and bipyridine complexes are around 2.2 Å . However, for low-spin iron (II) and (III) complexes, Fe-N distances of less than 2 Å have been reported [30,[33][34][35][36]. Therefore, in the [Fe(C 6 H 4 N 2 S 2 ) 3 ] 2?…”

Synthesis, Characterization and Crystal Structure Determination of a New Indium (III) Complex: [In(5,5’-DiMeBiPy)Cl3(DMSO)].2(DMSO)

“…[28][29][30][31][32] . In addition, two strong signals at 1050 and 944 cm -1 has been assigned to n(S=O) for free and coordinated DMSO, respectively [33][34][35] .…”

Two new lead(II) coordination polymer and discrete complex containing bipyridine ligands with different positioned methyl substituents: synthesis, characterization, crystal structure determination, and luminescent properties

“…Among the possible coordination modes of nitrate ligand with Pb(II) (Scheme 1), this compound uniquely contains two tridentate chelating/bridging mode (ivb), four bi-chelating mode (iii) together with two bidentate bridging mode (ii). In order to extend this investigation, in the present study two symmetrically methyl-substituted 2,2 0 -bipyridine ligands (5,5 0 -dimethyl-2,2 0 -bipyridine and 6,6 0 -dimethyl-2,2 0 -bipyridine) have been selected [31][32][33][34][35][36][37] (Scheme 2).…”