Tetrakis(N,N-diethylcarbamato)titanium(IV)

Abstract

The mononuclear title compound, [Ti(C5H10NO2)4], is a rare example of an eight-coordinate TiIV compound in which all donor atoms are O atoms. The coordination geometry around TiIV is pseudo-dodeca­hedral and the O—C—O angles of the carbamate ligands are slightly compressed [range 115.3 (2)–116.7 (2)°], apparently on account of the high coordination number. One ethyl group is disordered over two positions; the site occupancy factors are 0.64 and 0.36.

Ethylene polymerization using novel titanium catalytic precursors bearing N,N‐dialkylcarbamato ligands

“…1 and Table 2). The molecular structure of Ti(O 2 CNMe 2 ) 4 · CH 2 Cl 2 closely resembles those previously reported for the analogous compounds Ti(O 2 CNR 2 ) 4 (R = Et, i Pr) 38, 39. Thus, the Ti(IV) center displays a pseudo ‐dodecahedral geometry being coordinated to eight O‐atoms.…”

Titanium complexes bearing carbamato ligands as catalytic precursors for propylene polymerization reactions

“…and Table ). The molecular structure of IV closely resembles those previously reported for the analogous compounds Ti(O 2 CNR 2 ) 4 (R = Me, Et, and i Pr ). Thus, the Ti(IV) centre displays a pseudo ‐dodecahedral geometry being coordinated to eight O‐atoms.…”

Recent Advances in the Chemistry of Metal Carbamates

“…The aggregation is realized by bridging coordination of the carbamato moieties, as well as metal-metal bonding in some cases, and can be regulated by the nitrogen substituents, with bulkier groups usually favoring a lower degree of aggregation. For instance, [Ti(O 2 CNR 2 ) 4 ] (R = Me, Et, i Pr, pyrrolidine; Scheme 17 a) and [Nb(O 2 CNR 2 ) 5 ] (R = Me, Et; Scheme 17 c) are examples of mononuclear complexes featuring only chelating ( C/1 ) or chelating ( C/1 ) and monodentate ( M/1 ) carbamates, respectively [ 130 , 171 , 172 , 173 , 174 ]. On the other hand, homoleptic diethyl or dimethyl carbamato derivatives of W(III), Mo(II) and Sn(II) ( Scheme 16 c) are dinuclear, featuring bridging ligands ( B/2 ) and the first two complexes also M-M bonding [ 136 , 175 , 176 ].…”