Synthesis and Crystal Structure of a New Sulfur-Palladium-Nitrogen Complex

Some Novel Schiff Bases from Pyruvic Acid with Amines Containing N & S Donor Atoms: Synthesis, Spectral Studies and X-Ray Crystal Structures

“…The delocalization of π-electrons is obvious from the bond lengths viz. C1-N3 as 1.386(2) Å which is similar to the literature value of 1.381(3) Å and C2-N2 as 1.298 (3) Å, also similar to the reported value of 1.294(4) Å [27]. In addition, the bond lengths for S1-C1 is 1.655(2) Å and O1-C3 is 1.231 (2)Å that shows a high double bond character similar to the literature value respectively at 1.654(3) Å and 1.236(3) Å [27].…”

“…This compound was first reported by Dornow, A. et al [26] and the crystal and molecular structure of 2 was reported by Ghassemzadeh, M. et al [27], who re- The process of cyclization of compound 3 is also similar to compound 2 except the amine involved in this process is 2-methyl-3-thiosemicarbazide. Similarly, the infrared spectra of compounds 2 and 3 also have a missing OH stretching band confirming the cyclization process had taken place.…”

Synthesis and Crystal Structure of Schiff Bases Based on AMTTO (AMTTO = 4-Amino-6-methyl-3-thio-3,4-dihydro-1,2,4-triazin- 5(2H)-one)

“…and 121.1(2) pm (5) are indicative of a high double bond character as also observed in 1[15]. The iminic C5-N2 bond distance (126.6(2) -127.6(3) pm) is in the range observed in similar compounds such as 2-acetylthiophene-thiosemicarbazone (129.…”

Syntheses of New Sulfur−Nitrogen Palladacycles − Crystal Structures of [(AMTTO)PdBr2]2·3.5THF, [(AMTTO)PdI2]2·3MeOH, [(AMTTO)Pd(PPh3)Br]Br·MeOH, and [(AMTTO)Pd(PPh3)I]·2MeOH (AMTTO = 4-Amino-6-methyl-1,2,4-triazine-3-thione-5-one)

“…General Remarks: AMTTO [13] and 1 [3] were prepared according to literature procedures. Ϫ IR spectra were recorded on a PerkinϪElmer spectrometer 883 (KBr pellets, Nujol mulls, 4000Ϫ250 cm Ϫ1 ) or on a Bruker IFS 88 instrument (CsBr discs, 4000Ϫ400 cm Ϫ1 ; polyethylene discs, 500Ϫ100 cm Ϫ1 ; Nujol mulls).…”

“…[1a] Metal complexes of ligands such as S,N-heterocycles, amino acids, and proteins often exhibit enhanced biological activities compared to the uncomplexed ligand. [1b] [1c] In our investigations, we have shown that AMTTO Ϫ a representative of 4-amino-6-alkyl-1,2,4-triazine-5-one Ϫ acts as a chelating ligand in a 1ϩ1 fashion towards AgNO 3 in methanol {one strong AgϪS bond and a weak AgϪN contact leading to a distortion of a ideal linear [AMTTO-Ag-AMTTO] ϩ ion} and as a bidentate chelating ligand towards PdCl 2 in methanol/acetonitrile to give the air-stable [2] and [(AMTTO)-PdCl 2 ]·MeOH (1), [3] respectively. To the best of our knowledge, the latter constitutes the first palladacycle of AMTTO.…”