2 Homometallic Alkoxides

Homometallic Alkoxides 117
La(OPr i )3 !La[f(OC2H4)2N(C2H4OH)gf(OC2H4)N(C2H4OH)2g] C 3Pr i OH
R 0 D H; 716 x D 2
Ti(OPr i )4 !⊲Pr i O⊳Ti[⊲OCHR 0 CH2⊳3N]x C 3Pr i OH
R 0 D H, 717,718 Me; 715 x D 1
Ti(OPr i )4 !Ti[⊲OC2H4⊳2N⊲C2H4OH⊳]2 C 4Pr i OH
R 0 D H; 713 x D 2
M(OPr i )4.Pr i OH !⊲Pr i O⊳M[⊲OC2H4⊳3N]2 C 4Pr i OH
M D Zr, 713 Sn; 621,708 R 0 D H; x D 1
M(OPri )4.PriOH xN(CH2CHR0OH)3 !M[(OC2H4)2N(C2H4OH)]2 C 5PriOH M D Zr, 713 Sn; 621,708 R0 D H; x D 2
M(OEt)5 !⊲EtO⊳2M[⊲OCH2CHR 0 ⊳3N] C 3EtOH
M D Nb; R 0 D H, 625 Me; 715 x D 1
M D Ta; R 0 D H, 626 Me; 715 x D 1
Al(OR)3 !Al[(OC2H4)3N] C 3ROH
R D Pr i ,Bu t ; 694,719,720 x D 1
R 00 Si(OEt)3 !R 00 Si[⊲OC2H4⊳3N] C 3EtOH
R 00 D OEt, Ph; 72 x D 1
Ge(OR)4 !⊲RO⊳Ge[⊲OC2H4⊳3N] C 3ROH
R D Et, Pr i ; 711 x D 1
Ge(OR)4 !Ge[⊲OC2H4⊳2N⊲C2H4OH⊳]2 C 4ROH
R D Et, Pr i ; 711 x D 2
OV(OPr n )3 !OV[⊲OCH2CHR 0 ⊳3N] C 3Pr n OH
R 0 D Me, Bu t ,Ph,c-hexyl; 715 x D 1
RSn (OEt)3 !RSn[⊲OC2H4⊳3N] C 3EtOH
R D Me; Et, Bu n ,Ph; 722 x D 1
R 00 Ge⊲OR⊳3
!R 00 Ge[⊲OC2H4⊳3N] C 3ROH
x D 1; R D Et or Pr i ;R 0 D H; R 00 D Me; Bu n , Ph, etc. 712
Scheme 2.6
of which are biologically active 714 and/or useful in a variety of synthetic (Chapter 3,
Section 2.6) and catalytic systems. 715
4.5 Reactions of b-Diketones and b-Ketoesters
The enolic form, R 0 C⊲O⊳CHDC⊲OH⊳R 00 of a ˇ-diketone (R 0 and R 00 represent an
alkyl or aryl group or their fluoroanalogue) or ˇ-ketoester (R 0 D alkyl or aryl, and