Formation of structurally different solvated and non-solvated [Ni(PTSC)(PPh3)] (PTSC=salicylaldehyde-N-phenylthiosemicarbazide anion) crystals from single pot

Nickel(II)–PPh3 Complexes of S,N‐Substituted Thiosemicarbazones – Structure, DFT Study, and Catalytic Efficiency

“…In all studies except our previous paper, [14] O-, N-, and S-donor thiosemicarbazones with a thioamide group having only one substituent (-NHR-SH) have been reported. [15][16][17][18][19] Herein, we present new nickel(II)-PPh 3 complexes having an ONS-or ONN-chelating thiosemicarbazone. By describing the ONN complexes (5 and 7) of thiosemicarbazones with two substituents (-NHR-SR 1 ), we have shown that the N 4 nitrogen atom is able to coordinate in spite of the steric bulk of the methyl and phenyl groups.…”

“…In this context, the relatively low yield of the ONS complexes may be explained by the larger atomic (or van der Waals) radius of sulfur atom. The Ni-S bond lengths in the ONS complexes have an average value of 2.12 Å, [14][15][16][17][18][19] and the corresponding bond lengths (Ni-N) in the ONN complexes 4-7 are around 1.85 Å.…”

“…Complexes 6 and 7 have the same chelate rings, and complex 7 has a similar structure. [14][15][16][17][18][19] because of the relatively high electronegativity of the N 4 atom. Complexes 6 and 7 are stacked such that the chelate ring planes are parallel to each other, and there is no intra-or intermolecular hydrogen bond in the crystal structure.…”

Nickel(II) complexes of ONS and ONN chelating thiosemicarbazones with triphenylphosphine co-ligands

“…There are also the 1:2:2 ruthenium(II) complexes, [Ru(PPh 3 ) 2 (L) 2 ], which have four-membered chelate rings consisting of thioamide nitrogen (N 4 ) and sulphur atoms of arylidene-thiosemicarbazone ligands [12][13][14][15]. 2-Hydroxyarylidenethiosemicarbazones give 1:1 complexes with Ni(II) [16] and Pt(II) [17] in ONS coordination mode. Some arylidene and heterocyclic thiosemicarbazones coordinate to copper(I/II)-PPh 3 units by sulphur alone acting as a monodentate ligand [18,19].…”

Synthesis, characterization of N,N′-bis(2-hydroxynaphthalidene)phenylene-1,2-diamine with M(II)(M=Ni, Zn and Fe) Schiff-base complexes and their non-linear optical studies by z-scan technique

“…For all complexes, m(C@N) undergoes a negative shift by 5-25 cm À1indicating the coordination of azomethine nitrogen to the metal[26,27]. The band in the region 1315-1330 cm À1 which is assigned to phenolic m(C-O) in the free ligand, is shifted to higher wave number in the complexes suggesting the coordination of phenolic oxygen to metal ion[26,28,29]. The bands around 550 cm À1 and 470 cm À1 in the complexes are assigned to m(M-O) and m(M-N), respectively[30].…”