The first stable 9-anthryldiphosphene, TbtP=P(9-Anth) (1: Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, 9-Anth = 9-anthryl), was synthesized and its properties were revealed by spectroscopic and X-ray crystallographic analyses. The weak fluorescence of 1 was observed in hexane solution.
the electronic communication between the anthryl moiety and the P=P unit. It was found that TbtP=P(9-Anth) (1a: 9-Anth = 9-anthryl) showed weak fluorescence in hexane solution. Furthermore, the reactivities of anthryldiphosphene 1 with a chromium complex, chalcogenation reagents, a diene, and electron-deficient olefins have been revealed.
Biferrocenyl and ruthenocenyl diphosphenes were synthesized in a stable crystalline form as new members of a family of d-π systems containing heavier main group elements. Their structures and redox behavior were revealed using X-ray crystallographic analysis and cyclic voltammetry.
Synthesis and Structure of a Stable 1,3-Dihydrotriphosphane and Its Thermal Decomposition Leading to the Formation of the Corresponding Phosphine and Diphosphene
obtained from the diastereomer mixture of 1 revealed its molecular structure, having P−Pbond lengths of 2.2304(12) and 2.2322(12) Å and a P−P−P bond angle of 96.17(5)°, although the configuration could not be determined. Thermolysis of 1 in toluene led to the quantitative formation of TbtPH2 (2) and (E)-TbtPPFc (3), as judged by the 1H and 31P NMR spectra. Kinetic studies indicated that the thermolysis
用两个摩尔量的带有2,4,6-三[双(三(三甲基甲硅烷基)甲基]苯基(表示为Tbt)基团的磷化锂处理二氯二茂铁基膦,得到相应的1,3-二氢-2-二茂铁基三膦[ 1 ; (TbtHP)2 PFc,Fc =二茂铁基]作为三种非对映异构体的混合物,产率为73%。与先前报道的1,3-二氢三膦[(RHP)2 PR,R = Ph,t -Bu]形成鲜明对比的是,1在固态或溶液中在环境温度下对空气和湿气都非常稳定。的结构表征1用NMR光谱和X-射线结晶分析来实现的。在31 P 1观察到三种非对映异构体1的混合物的1 H NMR谱,特征为两个A 2 B和一个ABX系统,分别作为可分配给两个内消旋异构体和一个dl异构体的信号。从1的非对映异构体混合物获得的单晶的X射线晶体学分析显示其分子结构,P-P键长为2.2304(12)和2.2322(12)Å,P-P-P键角为96.17 (5)°,尽管无法确定配置。
Synthesis of Stable<i>cis</i>-Dichloro- and<i>cis</i>-Dimethylplatinum(II) Complexes Bearing Bulky Primary Phosphines and Introduction of an Alkyl Group on the Primary Phosphine Ligand
Stable cis-dichloro- and cis-dimethylplatinum(II) complexes bearing bulky primary phosphines, such as BbtPH2 (Bbt = 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl) and TbtPH2 (Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl), were synthesized and isolated as stable compounds. The treatment of cis-[PtMe2(PH2Bbt)2] with lithium diisopropylamide (LDA) followed by the addition of an alkyl halide afforded the corresponding alkylated complexes, cis-[PtMe2(PHRBbt)(PH2Bbt)] (R=Me, Et, Bu, etc.). The spectroscopic observation of the intermediacy of the lithiated complex, cis-[PtMe2(PHLiBbt)(PH2Bbt)], has been accomplished.