2 Homometallic Alkoxides

116 Alkoxo and Aryloxo Derivatives of Metals
where M D Al, Sb. 708
2M⊲OPr i ⊳3 C 3⊲HOC2H4⊳2NH benzene
! M2[⊲OC2H4⊳2NH]3 C 6Pr i OH ⊲2.210⊳
where M D Al. 694
M⊲OR⊳4.xROH C ⊲HOC2H4⊳2NH benzene
! ⊲RO⊳2M[⊲OC2H4⊳2NH] C ⊲2 C x⊳ROH
⊲2.211⊳
⊲M D Ti, 709,710 R D Bu n , x D 0. M D Sn; 621 R D Pr i , x D 1.
M D Ge; 711 R D Et, Pr i ; x D 0⊳
M⊲OR⊳4.xROH C 2⊲HOC2H4⊳2NH benzene
! M[⊲OC2H4⊳2NH]2 C ⊲4 C x⊳ROH
⊲2.212⊳
⊲M D Ge; 711 R D Et, Pr i ; x D 0. M D Sn; 621 R D Pr i ; x D 1⊳
M⊲OR⊳4.xROH C 3⊲HOC2H4⊳2NH
benzene
! Mf⊲OC2H4⊳2N⊲C2H4OH⊳gf⊲OC2H4⊳NH⊲C2H4OH⊳2g C ⊲4 C x⊳ROH
E
⊲2.213⊳
⊲M D Ti, 708 R D Pr i , x D 0, M D Zr, Sn, 708 R D Pr i , x D 1⊳
R 0 2 Ge⊲OR⊳2 C R 00 N⊲CH2CH2OH⊳2 ! R 0 2 Ge⊲OC2H4⊳2NR 00 C 2ROH ⊲2.214⊳
where R 0 D Me, Et; R 00 D Me, Pr n . 712
M⊲OEt⊳5 C ⊲HOC2H4⊳2NH benzene
! ⊲EtO⊳3Mf⊲OC2H4⊳2NHgC2EtOH ⊲2.215⊳
where M D Nb, 625 Ta. 626
M2⊲OEt⊳10 C 4⊲HOC2H4⊳2NH
benzene
! M2⊲OEt⊳f⊲OC2H4⊳2NHg3f⊲OC2H4⊳2NgC9EtOH ⊲2.216⊳
where M D Nb, 625 Ta. 626
M⊲OPr i ⊳5 C 3⊲HOC2H4⊳2NH
benzene
! Mf⊲OC2H4⊳2NHg2f⊲OC2H4⊳NH⊲C2H4OHg C 3Pr
F
i OH ⊲2.217⊳
where M D Nb, Ta 713
The products C, D, E, andF have been shown (Chapter 3, Section 2.5) to be useful
precursors for the synthesis of interesting types of heterometallic alkoxide systems.
4.4.3 Trialkanolamines
The tetradentate trialkanolamines have been shown to react with a variety of s-, p-,
d-, and f-block metals to produce thermally robust derivatives (Scheme 2.6), some