125950-54-1

Upstream product

• 7721-01-9 tantalum pentachloride 

Downstream Products

• 116076-77-8 (η(6)-C6Me6)Ta(O(2,6-C6H3iPr2))2Cl 
• 110551-63-8 (η6-C6Et6)Ta(2,6-diisopropylphenoxide)2Cl 
• 125950-49-4 (((CH₃)2CH)2C₆H₃O)2Cl(Ta(C(C(CH₃)3)CHCHC(C(CH₃)3))) 
• 125820-42-0 (η6-C6Et6)Ta(2,6-diisopropylphenoxide)2 
• 138753-73-8 (C₆H₃(CH(CH₃)2)2O)2ClTa(C₄D₂(C(CH₃)3)2) 
• 172164-66-8 Ta(OC₆H₃(CH(CH₃)2)2)2(C₉H₇N)2Cl₂ 
• 172164-62-4 Ta(OC₆H₃(CH(CH₃)2)2)2(C₁₀H₉N)Cl₃ 
• 172164-67-9 Ta(OC₆H₃(CH(CH₃)2)2)2(C₁₀H₉N)2Cl₂ 
• 138753-76-1 (C₆H₃(CH(CH₃)2)2O)2ClTa(C(C(CH₃)3CHC(C(CH₃)3)CD)) 
• 172164-68-0 Ta(OC₆H₃(CH(CH₃)2)2)2(C₅H₅N)2Cl₂ 
• 125950-49-4 (C₆H₃(CH(CH₃)2)2O)2ClTa(C₄H₂(C(CH₃)3)2) 
• 132322-83-9 Ta{N(C₂H₅)2}{C₆H₃(C₃H₇)2O}2Cl₂{O(C₂H₅)2} 
• 119145-81-2 (η6-C6(CD3)6)Ta(2,6-OC6H3(i-Pr)2)2Cl 

Relevant academic research and scientific papers

Arene complexes of tantalum(III) prepared by alkyne cyclization and alkoxide-exchange reactions. Arene folding and π localization upon coordination

Ta(DIPP)Cl4 (1, DIPP = 2,6-diisopropylphenoxide) has been prepared from the reaction of TaCl5 with 1 equiv of Me3SiDIPP in CH2Cl2 and is shown to be dimeric. While Ta(DIPP)Cl4 reacts with Et2O to form trans-Ta(DIPP)Cl4(OEt2) (2), TaCl5 and Me3SiDMP (DMP = 2,6-dimethylphenoxide) react in CH2Cl2/Et2O solution to provide trans-Ta(DMP)Cl4(OEt2) (3). Me3SiDMP (2 equiv) reacts with TaCl5 in CH2Cl2/Et2O solution to form the bisphenoxide complex Ta(DMP)2Cl3·OEt2 (6). All of these compounds cyclize 3-hexyne upon their two-electron reduction to form (η6-C6Et6)Ta(OR)xCl 3-x (4, OR = DIPP, x = 1; 5, OR = DMP, x = 1; 7, OR = DMP, x = 2) but do not readily undergo the analogous reaction with 2-butyne. However, (η6-C6Me6)Ta(DIPP)Cl2 (10) can be prepared in essentially quantitative yield from the reaction of (η6-C6Me6)Ta(DIPP)2Cl (9) with Ta(DIPP)2Cl3·OEt2, which also provides Ta(DIPP)3Cl2·OEt2 as the byproduct. Likewise, (η6-C6Et6)Ta(DMP)2Cl (7) is completely converted to (η6-C6Et6)Ta(DMP)Cl2 (5) upon its reaction with Ta(DMP)2Cl3·OEt2 (6). (η6-C6Me6)Ta(DIPP)Cl2 (10) crystallizes in the orthorhombic space group Pnma (No. 62) with a = 16.506 (3) A?, b = 17.237 (3) A?, c = 8.911 (1) A?, and V = 2535.3 A?3 with Z = 4 and ρcalcd = 1.55 g cm-3. The arene ligand in 10 is characterized by a folded structure and considerable localization of the π-electron density in a 1,4-diene fashion. The thermolysis of 10 produces free C6Me6 as the only identifiable product, while the thermal decomposition of 9 produces free C6Me6 along with the tucked in complex (η1-C6Me5CH2)Ta(DIPP) 2Cl2 (11). Compound 11 can be prepared in higher yields from 9 by its thermal decomposition in the presence of Me3SiCl.