摘要:
The 1,5-disubstituted thiocarbohydrazide ligands were prepared by the condensation of thiocarbohydrazide with salicylaldehyde and 5-methylsalicylaldehyde, respectively. The butyltin complexes, [(5-R-2-hydroxy)ArCH=NNH](2)CS(n-BuSnCl)(2), R = H(T1); R = Me(T2), based on the 1,5-disubstituted thiocarbohydrazide were obtained by microwave-assisted solvothermal reaction of n-butyltintrichloride precursor with the ligands in methanol environments, which have been structurally characterized by elemental analysis, IR and (H-1,C-13) NMR spectra. The crystals belong to monoclinic system, space groups C2/c(T1) and Pc(T2), respectively. The Sn atom is six-coordinated with distorted octahedral geometry by 0, N and S atoms from ligand, C atom of butyl and two Cl atoms. In the crystal, complex T1 forms three-dimensional supramolecular assembly mediated by noncovalent interactions such as C-H center dot center dot center dot Cl and pi-stacking interactions. Similarly, T2 forms an interesting two-dimensional supramolecular structure by noncovalent interactions (e.g. C-H center dot center dot center dot Cl and N-H center dot center dot center dot Cl) of one-dimensional band-like chain. These ligands and its butyltin complexes have growth effect on the target plants, such as Portulaca oleracea L., Amaranthus spinosus L., Cassia tora L., Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee and Amaranthus tricolor L. The ligand L1 has a good inhibitory effect on the growth of Cassia tora L., and complex T2 has selective inhibition on the growth of Portulaca oleracea L. and Amaranthus tricolor L., which can be used as a candidate compound for Cassia tora L., Portulaca oleracea L. and Amaranthus tricolor L. herbicide.
摘要:
Two 2-oxo-3-phenylpropionic acid arylformylhydrazone dibenzyltin (IV) complexes {[C4H3O(O)C=N-N=C(PhCH2)COOl(C6H5CH2)(2)Sn(CH3OH)}(2) (I) and {[t-Bu-C6H4(O)C=N-N=C(PhCH2)COO](C6H5CH2)(2)Sn(CH3OH)}(2) (II) have been synthesized and characterized by IR, H-1, C-13 and Sn-119 NMR spectra, HRMS, and elemental, thermal stability and single-crystal X-ray diffraction analyses. Complex I crystallizes in the triclinic system, space group P (1) over bar with a = 9.0392(9), b = 10.249(1), c = 15.5762(15) angstrom, alpha = 98.605(1)degrees, beta = 103.765(1)degrees, gamma = 104.056(1)degrees, Z = 2, V = 1326.3(2) angstrom(3) , D-c = 1.511 Mg.m(-3), mu(MoKa) = 1.005 mm(-1), F(000) = 612, R = 0.0206 and wR = 0.0524. Complex II belongs to triclinic system, space group P (1) over bar, a = 11.4643(3), b = 11.8885(3), c = 13.0362(4) angstrom, alpha = 73.800(1)degrees, beta = 71.679(1)degrees, gamma = 79.006(1)degrees, Z = 2, V = 1609.34(8) angstrom(3), D-c = 1.381 Mg.m(-3), mu(MoKa) = 0.833 mm(-1), F(000) = 688, R = 0.0244 and wR = 0.0244. In vitro antitumor activities of both complexes were evaluated by MTT against three human cancer cell lines (NCI-H460, HepG2 and MCF7) and human cell lines (HL7702). Both complexes exhibit better antitumor activity. Furthermore, the interaction between both complexes and calf thymus DNA was studied with EB fluorescent probe.