Nuclear magnetic resonance and infrared spectral studies on labile cis-dialkoxy-bis(acetylacetonato)titanium(IV) compounds
Nuclear magnetic resonance and infrared spectral studies on labile cis-dialkoxy-bis(acetylacetonato)titanium(IV) compounds
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不稳定顺式二烷氧基双(乙酰丙酮)钛(IV)化合物的核磁共振和红外光谱研究
DOI：
10.1039/j19690000282
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发表时间：
1969
期刊：
影响因子：
--
通讯作者：
C. Holloway
中科院分区：
文献类型：
--
作者：
D. C. Bradley;C. Holloway
用红外光谱和变温n.m.r研究了六配位钛(IV)化合物Ti(Acac)2X2，其中X=MeO、ETO、CF3CH2O、PrIO、BUNO、BuTO、1/2[OCH2CMe2CH2O]和Cl。所有这些化合物都采用顺式构型，并进行了分子内重排，并由n.m.r求出了传统的动力学参数。测量。顺式构型的优先选择被认为是由于配体→金属的π-电子给予，并讨论了这些不稳定化合物的消旋可能的机理。
The six-co-ordinated titanium(IV) compounds Ti(acac)2X2, where X = MeO, EtO, CF3CH2O, PriO, BunO, ButO, ½[OCH2CMe2CH2O], and Cl, have been studied in solution by infrared spectroscopy and variable-temperature n.m.r. All these compounds adopt the cis-configuration and undergo intramolecular rearrangement, and conventional kinetic parameters have been derived from the n.m.r. measurements. The preference for the cis-configuration is believed to be due to ligand → metal π-electron donation, and possible mechanisms for the proposed racemization of these labile compounds are discussed.