Ichiro Kijima

Preparation of monoalkyltin(IV) compounds by the reaction of organic tin(II) compounds with n-alkyl halides

Reactions of Sn(OR)2 compounds (R = CH3CCOCH3, CH3CHCO2Et, PhCHCOPh, and o-C6H4CO2Et) with n-alkyl iodides, R′I (R′ = Me, Et, n-Bu), gave SnIV compounds to type R′Sn(OR)2I.

The Cyclic Trimerization of Isocyanates by Organic Tin(II) Compounds Containing Sn–O–C Bonds

Organic tin(II) compounds containing Sn–O–C bonds were found to be effective catalysts for the cyclic trimerization of phenyl and ethyl isocyanate. The cyclic trimerization mechanism is discussed.

A New Method for the Synthesis of β-Diketonato-Silver Complexes

Abstract The equimolar reaction of β-diketone (HL) containing triethylamine (Et3N) with silver nitrate (AgNO3) in a mixed solution of dry methanol (MeOH) and acetonitrile (CH3CN) leads to the formation of the following pure β -diketonatosllver complexes: acetylacetonatosllver Ag(acac), benzoylacetonatosilver Ag(bzac), dibenzoylme-thanatosilver Ag(dbzm), and bipivaloylmethanatosilver Ag(dpm). These silver complexes have been characterized by elemental analyses and IR spectroscopy.

Preparation of Tris(β-Diketonato)Indium and Tris(β-Ketoester) Indium from the Reaction in Non-Aqueous Solution

Abstract Anhydrous indium chloride in non-aqueous solution reacted with β-diketones (H-dik) or β-ketoesters (H-etac) in the presence of amines or sodium cyanate to give the corresponding indium chelate compounds of the type In(dik)3 or In(etac)3 in high yield, where H-dik = CH3cOCH2COCH3 (Hacac), CH3COCH2COC6H5 (Hbzac), C6H5COCH2COC6H5 (Hdbzm), and H-etac = CH3COCH2COOC2H5 (Hetac).

A New Method for Synthesizing Dialkoxytin(II) and Mono and Diaryloxytin(II) Compounds

Abstract The reactions of bis(β-diketonato)tin(II), such as bis(2, 4-pentanedionato)tin(II), Sn(acac)2, bis(1-ethoxy-1, 3-butanedionato)tin(II), Sn(etac)2, and bis(1-methoxy-1, 3-butanedionato)-tin(II), Sn(mtac)2, with sodium alkoxide (NaOR, R = CH3, C2H5) in alcohol/benzene at room temperature have been found to give the corresponding dialkoxytin(II) compounds. Sn(acac)2 reacted also with o-substituted phenols [o-X-C6H4 OH; X = CH3CO, CH3OC(O), CH3O, Cl, (CH3)3C] in a molar ratio of 1:2 at 90 °C to afford the corresponding monosubstituted tin(II) compound, [Sn(OC6H4-X)(acac)], but the reaction with C6H5OH produced only the diphenoxide, Sn(OC6H5)2. Referee I: M. Denk Referee II: M. Zeldin