Pseudohalide complexes of palladium(II) containing PCP pincer: Synthesis, characterization, and their antimicrobial activities

A PCP Pincer Ligand for Coordination Polymers with Versatile Chemical Reactivity: Selective Activation of CO2 Gas over CO Gas in the Solid State

“…2188 cm À1 (Figure 3C). [26] One explanation for the lack of reactivity observed in this case may be that the PdÀN 3 groups are inert owing to the electronic nature of the metal center when incorporated into the MOF.However, this explanation is directly contradicted by the apparent reactivity of the Pd À Me material towards CO 2 ,which appears to proceed at lower temperature than in the molecular regime.A na lternative explanation is that CO gas is not permitted access to the pores and therefore only am inority of PdÀN 3 groups at (or near) the surface of the PCM-36 crystallites may undergo reaction. In accordance with this hypothesis,i twas found that CO gas was not adsorbed inside an evacuated sample of PCM-36 that was subsequently able to adsorb CO 2 without impediment (Figure 2A).…”

“…TheF TIR spectrum of this material shows an intense new band due to the characteristic N 3 symmetric stretching mode (n N 3 = 2075 cm À1 ), which is significantly shifted compared to the corresponding band for free TMS-N 3 (n N 3 = 2130 cm À1 ) and is in good agreement with the observation of Lee et al (Figure 3B). [26] Elemental microanalysis of the PCM-36ÀN 3 material showed asignificant increase in the total amount of N( to 3.06 %, see above). We were interested in generating the azide-functionalized material because molecular analogues are able to directly react with CO gas to form NCO ligands by an intramolecular rearrangement, accompanied by the release of N 2 gas ( Figure 2B).…”

Applications of Five-Membered Ring Products in Cyclometalation Reactions for Other Purposes

“…This study needs to be pursued further in future, however, in order to be able to fi nd the role of different phosphine ligands in this fi eld. Park et al [ 76 ] reported on other medicinal uses employing antimicrobial activity. The fi ve pincer palladium compounds 9.17 -9.21 are prepared by substitution reactions, as shown in Eq.…”

“…These compounds were tested for antimicrobial activity on a wide range of bacterial strains. Compound 9.17 was found to be potential in this respect [ 76 ]. (9.6) Ozerianskyi et al [ 77 ] reported on antibacterial and antifungal activities in medical studies on main group metal cyclometalation compounds, e.g., organotin compounds, 9.22 , 9.23 , and 9.24 , as shown in Eqs.…”

Synthesis and antimicrobial properties of lipophilic Schiff base copper and palladium complexes

“…Indeed, metals are now known to play a critical role in neurological disorders [2], chelation therapy in cases of metal poisoning [3], antimicrobial studies [4], and in the treatment of cancer [5,6]. One area that has received considerable recent attention stems from the observation that simple copper(II) [7] and palladium(II) complexes [8][9][10][11][12][13] display potent antifungal and antibacterial properties. The development of drug-resistant bacteria has reinforced the importance of research focused on using metal-based complexes in medicine, as the mechanism of action of inorganic compounds differs from that of traditional organic-based treatments [14,15].…”