Category: 13820-53-6

Controlled C-H bond activation leads to orthometalation and ring-hydroxylation in Ni(II) and Pd(II) complexes of a common tridentate azophenyl-salicylaldimine ligand was written by Ali, Akram;Bhowmik, Saumitra;Sengupta, Arunava;Mukhopadhyay, Narottam;Mukherjee, Rabindranath. And the article was included in Inorganica Chimica Acta in 2022.Application In Synthesis of Sodium tetrachloropalladate(II) The following contents are mentioned in the article:

Using a common tridentate azophenyl-appended salicylaldimine ligand in its deprotonated form (L⁴)^–, two classical coordination complexes [Ni(L⁴)₂] (1) (Ni^IIO₂N₂N’₂ coordination) and [Pd(L⁴)Cl]•CH₂Cl₂ (2) (Pd^IIONN’Cl coordination), two cyclometalated complexes [M(L^4*)] (M = Ni 3 and Pd 4; M^IIONN’C coordination), and two azophenyl ring-hydroxylated complexes [M(L⁴-O)] (M = Ni 5 and Pd 6; M^IIONN’O’ coordination), obtained due to selective oxidation of M^II-C bond, were synthesized. Complex 1 is paramagnetic (S = 1) but all other complexes are uniformly diamagnetic (S = 0). For 1–6, absorption spectral and redox properties were studied, along with single-crystal structural anal. The regiospecific aryl ring-hydroxylation of M-C bonds in 3 and 4 are achieved due to H₂O₂ and m-CPBA oxidation, resp., affording 5 and 6. Coulometically generated 1-electron oxidation and 1-electron reduction were done on 1–6, and the nature of the resulting species was probed by EPR and absorption spectral studies. While oxidation of 1 and 3 generate Ni(III) species, it is a resonance hybrid between Ni(III) and Ni(II)-O(phenoxyl radical) species for 5. However, 2, 4, and 6 generate ligand radical species. Reduction of 1–6 generates ligand radical species uniformly. D. functional theory (DFT) calculations at the B3LYP level of theory were done to extract information about the electronic structure of the complexes. Time-dependent (TD)-DFT calculations were done to shed light on the origin of observed absorption spectra. Plausible mechanisms are proposed for the observed orthometalation and ring-hydroxylation reactions. This study involved multiple reactions and reactants, such as Sodium tetrachloropalladate(II) (cas: 13820-53-6Application In Synthesis of Sodium tetrachloropalladate(II)).

Sodium tetrachloropalladate(II) (cas: 13820-53-6) belongs to organic chlorides. Chlorinated organic compounds are found in nearly every class of biomolecules and natural products including alkaloids, terpenes, amino acids, flavonoids, steroids, and fatty acids. The haloform reaction, using chlorine and sodium hydroxide, is also able to generate alkyl halides from methyl ketones, and related compounds. Chloroform was formerly produced thus.Application In Synthesis of Sodium tetrachloropalladate(II)

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Suzuki-Miyaura coupling and O-arylation reactions catalysed by palladium(II) complexes of bulky ligands bearing naphthalene core, Schiff base functionality and biarylphosphine moiety was written by Kaushal, Jolly;Singh, Siddhant;Oswal, Preeti;Arora, Aayushi;Nautiyal, Divyanshu;Kumar, Arun. And the article was included in Journal of Molecular Structure in 2022.Computed Properties of Cl4Na2Pd The following contents are mentioned in the article:

Schiff bases L1 [i.e., 2-(diphenylphosphino)-N-(naphthalen-1-ylmethylene)ethanamine], L2 [i.e., 2- (diphenylphosphino)-N-(naphthalen-2-ylmethylene)ethanamine], L3 [i.e., 2-(1-(2-(diphenylphosphino)ethylim- ino)ethyl)naphthalen-1-ol] and L4 [i.e., 2-((2-(diphenylphosphino)ethylimino)methyl)naphthalen-1-ol] were synthesized using a straightforward methodol. which involves a condensation reaction between H₂N-CH₂-CH₂-PPh₂ and appropriate carbonyl compound Due to the presence of diphenylphosphine (-PPh₂) moiety and >C = N- functionality, these compounds behave as ligands and undergo complexation reaction with palladium on treatment with Na₂PdCl₄ to yield the palladium(II) complexes (1–4). Ligands as well as complexes were characterized using standard NMR spectroscopic techniques. ESI-MS and single crystal x-ray diffraction studies corroborate the structures of complexes. Crystal structures of complexes 1–3 reveal clearly that the geometry around Pd center is distorted square planar. Ligands L1 and L2 are coordinated to Pd center in bidentate (P, N type) mode, however, L3 and L4 act as a tridentate (P,N,O type) ligand and bind with metal in anionic mode. The Pd P and Pd N bond distances in complexes 1–3 are in the ranges 2.204-2.212 Å and 2.023-2.072 Å, resp. Complex 3 [i.e., PdCl(L3-H)] also has a Pd-O bond, the length of which is 2.009(3) Å. All the complexes have potential for catalyzing O-arylation (C-O coupling) of phenol and Suzuki-Miyaura coupling (SMC) reactions. Both bromoarenes and chloroarenes can be used as substrates in Suzuki coupling and converted into biaryl derivatives For O-arylation reactions of phenol, bromoarenes were used as arylating agents. For catalysis of such reactions (i.e., C-O coupling), high (0.1 mol%) catalyst loading is required. However, Suzuki reactions require low (0.001 mol%) loading of catalysts to occur with bromoarenes and give the products. The high potential of the complexes is also evident from the fact that they also convert different aryl chlorides into the coupled products in Suzuki coupling. ³¹P{¹H} NMR data reveal that the electronic environments of nuclei of phosphorous donors are closely similar in all the four ligands. Similar magnitude of deshielding of the ³¹P{¹H} signals in all the complexes indicate that, while forming the dative bond, the P donor of all the ligands transfer the electron d. to the palladium to a similar extent. Hence, the electronic effects created by the ligands through the phosphorous donor are similar in all the complexes. Therefore, it is inferred that variation in their catalytic performance is because of difference in the binding mode of the ligand and/or minor alteration in the architecture of organic ligand. Amongst them, complex 2 shows the highest catalytic activity, and the least active catalyst is complex 3 for C-C coupling reactions. For C-O coupling reactions, the efficiencies of complexes 1 and 2 are slightly higher than those of complexes 3 and 4. This study involved multiple reactions and reactants, such as Sodium tetrachloropalladate(II) (cas: 13820-53-6Computed Properties of Cl4Na2Pd).

Sodium tetrachloropalladate(II) (cas: 13820-53-6) belongs to organic chlorides. Chlorinated organic compounds are found in nearly every class of biomolecules and natural products including alkaloids, terpenes, amino acids, flavonoids, steroids, and fatty acids. Organochlorine compounds are lipophylic, meaning they are more soluble in fat than in water. This gives them a high tenancy to accumulate in the food chain (biomagnification).Computed Properties of Cl4Na2Pd

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics