Untitled

Abstract

Tp2Ti [Tp = hydrotris(pyrazol-1-yl)borate] is a stable hard donor complex of divalent titanium that shows controlled reaction chemistry with simple chalcogen oxidants.

Synthetic Approaches to (smif)2Ti (smif = 1,3-di-(2-pyridyl)-2-azaallyl) Reveal Redox Non-Innocence and C–C Bond-Formation

“…One wonders whether bis -( tris -pyrazolylborate)Ti 27 and (porphyrin)Ti(alkynes) 26 actually have related electronic features that would better fit a Ti(III) description, although the latter compounds have metalacyclopropene character, and are thus “oxidized” by p-backbonding.…”

“…The coordination compounds that can legitimately be described as Ti(II) are limited to trans -(tmeda) 2 TiCl 2 , 16–18 Girolami’s bis -dmpe complexes (i.e., trans -(dmpe) 2 TiX 2 ; X = Cl, BH 4 , Me, OPh) 19–22 and related derivatives (e.g., (dmpe)TiMe 2 (diene) 23 ), 24,25 (porphyrin)Ti(alkynes), 26 and the recently prepared bis -( tris -pyrazolylborate)Ti. 27 In the context of applications to organic synthesis, 28–31 calixarene dianion Ti(II) arene and alkyne complexes have also been explored. 32,33 …”

Ophthalmic changes in severe anorexia nervosa: A case series

“…1). Although this compound was easily reduced by Zn, it subsequently formed an insoluble purple precipitate typically associated with over‐reduction 50, 51. Thus, because of the lack of sufficient Ti(III) species throughout the polymerization, when M n increases from 30,000 to 50,000 it is associated with a high intercept at low conversion and a very broad distribution.…”

Synthesis and characterization of a homoleptic titanium dihydrobis(pyrazol-1-yl)borate complex

“…The syntheses of several complexes of titanium have been reported together with a huge number of reactivity and catalysis studies, particularly with ancillary ligands such as hydrotris(pyrazol-1-yl)-borate and similar scorpionates bearing various substituents on the pyrazole rings [3]. Besides all, homoleptic complexes of Ti(II) and Ti(III) with hydrotris(pyrazol-yl)borate have been prepared and characterized [4]. Another reported homoleptic poly(pyrazolyl)borate derivative is the tetrakis(pyrazol-1-yl)borate complex Ti(j 2 -BPz 4 ) 4 [5].…”