Crystal molecule structure of tetraphenoxytitanium(IV) monophenolate, Ti(OPh)4, HOPh

Abstract

An X-ray diffraction study of tetraphenoxytitanium@) monophenolate has shown the structure to be dimer of octahedrally co-ordinated alkoxytitanium molecules.

Atropisomeric amides: Achiral ligands with chiral conformations

“…53 The titanium phenoxide Ti-O distances in 6a and 6b are between 1.917(1) Å and 1.931(2) Å, which are longer than titanium phenoxide distances in four-coordinate complexes of the type (ArO) 2 TiX 2 (1.7 Å to 1.8 Å). [54][55][56] The titanium phenoxide Ti-O distances in 6a and 6b are longer than the terminal Ti-O distances in the octahedral dimeric [Ti(OPh) 4 (HOPh)] 2 (1.789-1.884 Å), 57 octahedral titanium salen complexes (salen)TiX 2 (X=Me, Cl, OAr), which range from 1.829 Å to 1.899 Å, [58][59][60] and (tetrahydrosalen) Ti(O-iPr) 2 (1.905 Å to 1.914 Å). 61 The titanium amide carbonyl Ti-O bond distances are considerably longer, as expected, and range from 2.142(2) Å to 2.178(2) Å.…”

Titanium(IV) Neopentoxides. X-ray Structures of Ti3(μ3-O)(μ3-Cl)(μ-OCH2CMe3)3(OCH2CMe3)6and [Ti(μ-OCH2CMe3)(OCH2CMe3)3]2

“…55 Other homo-and heteroalkoxide titanium species, which had been previously characterized, adopted multinuclear geometries (>3 Ti). [16][17][18] It is unusual that even with the excess alcohol in solution 2 does not adopt an octahedral geometry by coordination of free alcohol as was noted for the aryloxide derivative, [Ti(µ-OPh)(OPh) 3 ‚HOPh] 2 , 58 where OPh ) OC 6 H 5 , or the group IV congener, [Zr(µ-OPr i )(OPr i ) 3 ‚HOPr i ] 2 . 59 For a five-coordinated metal center there are two possible geometries, trigonal bipyramidal (TBP) and square pyramidal (SP).…”

Synthesis and spectroscopic characterization of aryloxide derivatives of titanium(IV) and zirconium(IV)

“…The parent ion peaks in the mass spectra of (6), (11), and (16) result from the loss of the CHO group (M-29) [28]. The lower stability of the parent adduct ion, [Zr(OAr 5 ) 4 (thf)] þ 2 [4] is supported by the liberation of THF molecules in the mass spectrum of (17).…”

“…The structures of titanium and zirconium aryloxides often depend on the nature of aryloxide ligands and their stoichiometry [1], as is depicted by following typical examples:[Ti(l-Cl) 2 Cl(OPh)] µ [15], [TiCl 2 (OPh)-(l-OPh)] 2 [16], [Ti(OPh) 3 (l-OPh)(PhOH)] 2 [17], [Ti (OAr) 4 ] (OAr ¼ C 6 H 3 Pr i 2 -2,6; C 6 H 4 Bu t -2, C 6 HMe 4 -2,3,5,6) [18,19], and [ZrCl 2 (OC 6 H 3 Me 2 -2,6) 2 (thf)] [20].…”