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Synthesis, Structure and Biological Evaluations of Zn(II) Pincer Complexes Based on S-Triazine Type Chelator
| Content Provider | MDPI |
|---|---|
| Author | Refaat, Heba M. Alotaibi, Atallh A. M. Dege, Necmi El-Faham, Ayman Soliman, Saied M. |
| Copyright Year | 2022 |
| Description | 2,4-bis (3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine (BPMT) pincer ligand was used to synthesize the new $[Zn(BPMT)(NCS)_{2}$] (1) and $[Zn(BPMT)(Br)_{2}$] (2) complexes by a reaction with $Zn(NO_{3})_{2}·6H_{2}$O in the presence of either KSCN or KBr, respectively. The structure of complex 1 has been exclusively confirmed using single crystal X-ray diffraction. In this neutral heteroleptic complex, the BPMT is a pincer chelate coordinating the Zn(II) ion via three interactions with the two pyrazole moieties and the s-triazine core. Hence, BPMT is a tridentate NNN-chelate. The coordination environment of Zn(II) is completed by two strong interactions with two terminal $SCN^{−}$ ions via the N-atom. Hence, the Zn(II) is penta-coordinated with a distorted square pyramidal coordination geometry. Hirshfeld analysis indicated the predominance of H…H, H…C and N…H intermolecular interactions. Additionally, the S…H, S…C and S…N contacts are the most significant. The free ligand has no or weak antimicrobial, antioxidant and anticancer activities while the studied Zn(II) complexes showed interesting biological activity. Complex 1 has excellent antibacterial activity against B. subtilis (2.4 μg/mL) and P. vulgaris (4.8 μg/mL) compared to Gentamycin (4.8 μg/mL). Additionally, complex 1 (78.09 ± 4.23 µg/mL) has better antioxidant activity than 2 (365.60 ± 20.89 µg/mL). In addition, complex 1 (43.86 ± 3.12 µg/mL) and 2 (30.23 ± 1.26 µg/mL) have 8 and 12 times the anticancer activity of the free BPMT ligand (372.79 ± 13.64 µg/mL). |
| Starting Page | 3625 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules27113625 |
| Journal | Molecules |
| Issue Number | 11 |
| Volume Number | 27 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-05 |
| Access Restriction | Open |
| Subject Keyword | Molecules Inorganic Chemistry Zn(ii) Pincer S-triazine Based Ligand Hirshfeld Anticancer Antimicrobial |
| Content Type | Text |
| Resource Type | Article |
