Nikita Sharma

Reactions of bis(N-phenylsalicylidene iminato)aluminium-di-μ-isopropoxo-di-isopropoxo aluminium(III) with glycols

Reactions of bis(N-phenylsalicylidene iminato)aluminium-di-μ-isopropoxo-di-isopropoxo aluminium(III), [C6H4O{CH=N(C6H5)}]2Al(μ-OPri)2Al(OPri)2 with glycols in 1:1 molar ratio in refluxing anhydrous benzene yielded binuclear complexes of the type, [C6H4O{CH=N(C6H5)}]2Al(μ-OPri)2Al(O-G-O) [where G = (CH2)2, CH2CH(CH3), CH2CH(C2H5), CH(CH3)CH(CH3), (CH2)5, C(CH3)2CH2CH(CH3), (CH2)6], respectively. All these binuclear complexes have been characterised by elemental analysis, molecular weight measurements and spectroscopic(IR and NMR) studies.

Synthesis and structural characterization of some binuclear acetylacetone and Schiff’s base complexes containing aluminum(III) atoms in different coordination states

Abstract Some Schiff’s base complexes of aluminum(III) of the type (CH3COCHCOCH3)2Al(µ-OPri)2AlLn(OPri)2-n [where LH=OHC(R)=CHC(R′)=NC6H5; R=R′=CH3,C6H5; R=CH3, R′=C6H5; LH=C6H4(OH)CH=NC6H5 and n=1 or 2] were prepared and characterized by various spectroscopic techniques. The molecular weight measurements indicated their binuclear nature. The 27Al nuclear magnetic resonance spectra of representative compounds [(CH3COCHCOCH3)2Al(µ-OPri)2Al{OC(C6H5)=CHC(C6H5)=NC6H5}(OPri)] [3] and [(CH3COCHCOCH3)2 Al(µ-OPri)2Al{OC(CH3)=CHC(CH3)=NC6H5}2] [6] suggest the presence of aluminum(III) atoms in different coordination states.

Molecular structure of bis(N-phenylsalicylideneiminato)aluminium-di(μ-isopropoxy)di(isopropoxo)aluminium(III) and its reactions with alkoxyalkanols

A novel heterocyclic derivative of aluminium(III) [C6H4O{CHN(C6H5)}]2Al(μ-OPri)2Al(OPri)21 has been synthesized by the reaction of aluminium isopropoxide with N-phenylsalicylidene imine in 1 ∶ 1 molar ratio in refluxing anhydrous benzene. Reactions of 1 with alkoxyalkanols in 1 ∶ 1 and 1 ∶ 2 molar ratios in refluxing anhydrous benzene yielded binuclear complexes of the types, [C6H4O{CHN(C6H5)}]2Al(μ-OPri)2Al(OCH2CH2OR)(OPri) and [C6H4O{CHN(C6H5)}]2Al(μ-OPri)2Al(OCH2CH2OR)2 (where RCH3, C2H5 and C4H9n), respectively. All of these binuclear complexes have been characterized by elemental analysis, molecular weight measurements, and spectral studies. The FAB mass spectrum and 27Al NMR spectrum of 1 indicate that it is a discrete unsymmetrical dimer containing four- and six-coordinated aluminium(III) atoms as confirmed by its single crystal X-ray structure.

Synthesis and characterization of the coordination polymer [(THF)K(μ-OPri)2Al(μ-OPri)2]n

Abstract Reaction of [Al(OPri)3] with K(OPri), in 1:1 molar ratio in refluxing anhydrous tetrahydrofuran yields a polymeric complex [(THF)K(μ-OPri)2Al(μ-OPri)2]n. The complex is characterized by spectroscopic studies and single crystal X-raydiffraction analysis.

Controlled Sol-Gel Hydrolysis for Synthesis and Characterization of Χ-Al2O3 Nano-Powder Using New Class of Precursors of Bis (N Phenylsalicylideneiminato) Aluminum(III)-Di-(μ-Isopropoxo)-Di-Isopropoxo Aluminum(III) Modified By Mono-Carboxylic Acids

Reactions of bis(N-phenylsalicylideneiminato)aluminum(III))-di-(μ- isopropoxo)-di-isopropoxoaluminum (III) with mono-carboxylic acids yield product of the type [C6H4O{CH=N(C6H5)}]2A1(μ-OPri)2Al(OOCR) (OPri)2–n [where R=CH3, C2H5, C3H7 and n=1 or 2). Progress of the reactions was monitored by estimating liberated 2-propanol in benzene-2-propanol azeotrope by oxidimetric method. All the yellow foamy solid products are soluble in common organic solvents. They were characterized by elemental analyses, FT-IR and (1H, 13C and 27Al) NMR spectral studies. Molecular weight measurements in refluxing anhydrous benzene indicate their binuclear nature. Sol-gel hydrolysis of [C6H4O{CH=N(C6H5)}]2Al(μ-OPri)2Al(OPri)2] (A), and representative compounds [C6H4O{CH=N(C6H5)}]2Al(μ- OPri)2Al(OOCCH3)(OPri)] (1) and [C6H4O{CH=N(C6H5)}]2Al(μ- OPri)2Al(OOCCH3)2] (2) followed by sintering at 600° C yielded cubic primitive phase of nano-crystallites of χ-Al2O3 [JCPDF # 040880] in all the cases, as reflected by their powder X-ray diffraction pattern. The IR, SEM and EDX studies also support the formation of the transition alumina.