Polyhedron p. 1851 - 1861 (1998)
Update date:2022-08-11
Topics:
Spiccia
West
Zhang
Reactions between lead carboxylates Pb(O2CR)2 and Ti(OPr-i)4 produce complexes of empirical formulae Pb2Ti2(O)(O2CR)2(OPr i)8 (R = C3F7 1 ; C(CH3)3 2) in toluene and Pb2Ti4(O)2(O2CR) 2(OPri)14 (R = CH(CH3)2 3) in PriOH solution. 201Pb NMR evidence indicates that both types of complex form in alcoholic solution. The compound 4 having a Pb3Ti3 core is produced when Pb(O2CCH(CH3)2)2 reacts with Ti (OPri) 4 in toluene. Attempts to prepare acetylacetonate derivatives of compounds having 1:1 or 1:2 Pb : Ti stoichiometries by direct substitution of the compounds gave poorly soluble Pb containing products but direct reaction of Pb(O2CCH3)2 or PbO with Ti-acetylacetonate-alkoxide species gave compounds of empirical formulae Pb3Ti3(O)4(O2CCH3) 2(OPri)7(acac) 5 and Pb2Ti2(O)(OEt)8(acac)2 6. Reaction of Ti(OR)4 (R = OPri, Et) with acetic acid yields products which further react with PbO to form the previously characterised Pb - Ti compounds Pb2Ti2(O)(O2CCH3) 2(OPri)8 7 and Pb2Ti4(O)2(O2CCH3) 2(OEt),14 8. Molecular weight measurements, 207Pb, 19F, 1H and 13C NMR and IR spectral data have been used to derive empirical formulae for the various complexes isolated.
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Doi:10.1039/c6ob01675h
(2016)Doi:10.1007/s10593-021-02908-4
(2021)Doi:10.1039/c4cc08946d
(2015)Doi:10.1021/ja01556a001
(1958)Doi:10.1021/jo01103a611
(1958)Doi:10.1080/00021369.1984.10866566
(1984)
