Niobium Complexes Supported by Chalcogen-Bridged [OEO]-Type Bis(phenolate) Ligands (E = S, Se): Synthesis, Characterization, and Phenylacetylene Polymerization

被引：0
作者：
An, Jing [1 ]
Ishii, Akihiko [1 ]
Nakata, Norio [1 ]
机构：
[1] Saitama Univ, Dept Chem, Grad Sch Sci & Engn, 255 Shimo Okubo,Sakura Ku, Saitama 3388570, Japan
来源：
MOLECULES | 2023年 / 28卷 / 06期
关键词：
niobium; sulfur; selenium; tridentate ligand; X-ray diffraction analysis; polymerization; phenylacetylene; RING-OPENING POLYMERIZATION; OSO-TYPE LIGAND; TITANIUM COMPLEXES; EXTRA DONOR; COORDINATION CHEMISTRY; ZIRCONIUM COMPLEX; GROUP-4; COMPLEXES; METAL-COMPLEXES; 1-HEXENE; CATALYSTS;
D O I：
10.3390/molecules28062573
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Trichloro niobium(V) complexes 3 and 4 with the sulfur- or selenium-bridged [OEO]-type bis(phenolate) ligands (E = S, Se) were synthesized and fully characterized on the basis of their NMR spectroscopic data and X-ray crystallographic analysis. In the crystalline state of 4, the [OSeO]-core of the ligand was coordinated to the niobium center in a fac-fashion. The corresponding tribenzyl niobium(V) complexes 5 and 6 were also prepared by the reactions of 3 and 4 with 3 equivalents of PhCH2MgCl in toluene. The X-ray diffraction analysis of 6 revealed that the distorted six-coordinated niobium center incorporated in the [OSeO]-type ligand took a mer-fashion, and one benzyl ligand was coordinated to the niobium center by eta(2)-fashion. Complexes 5 and 6 were tested for the phenylacetylene polymerization that produced poly(phenylacetylene)s (PPAs), oligomers, and triphenylbenzenes (TPBs) depending on the chalcogen atom in the [OEO]-type ligand.
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页数：11
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