Die Kristallstruktur von Diäthylamino‐titantrichlorid

Abstract

Diäthylamino‐titantrichlorid, (C2H5)2NTiCl3, kristallisiert monoklin mit der Raumgruppe P21/n und den Gitterkonstanten a = 6,131 Å, b = 12,290 Å; c = 12,081 Å und β = 87,20°. Die Elementarzelle enthält vier Formeleinheiten. Die Strukturbestimmung mit dreidimensionalen Diffraktometerdaten ergab für 1509 beobachtete Reflexe einen R‐Faktor von 0.079. Das Titanatom besitzt die Koordinationszahl sechs. Die NTiCl5‐Oktaeder sind über gemeinsame ClCl‐Kanten zu unendlichen Zickzack‐Ketten verknüpft. Das Stickstoffatom und ein Chloratom nehmen an der Verbrückung nieht teil. Der TiN‐Abstand ist mit 1,852 Å deutlich kürzer als eine hypothetische reine Einfachbindung.

Titanium η1-Pyrrolyl Complexes: Electronic and Structural Characteristics Imposed by the N,N-Di(pyrrolyl-α-methyl)-N-methylamine (dpma) Ligand

“…The structure of 2 as determined by single-crystal X-ray diffraction includes a Ti−N(NMe 2 ) bond distance of 1.849(2) Å, somewhat shorter than found for equatorial Ti−N(NMe 2 ) of 1.859(3) Å in 1 . In fact, the Ti−N(NMe 2 ) bond distance in 2 is comparable to that found in [Ti(NEt 2 )Cl(μ-Cl) 2 ] x of 1.852(4) Å …”

Convenient Synthesis of N-Trimethylsilylaminotitanium Trichlorides

“…Penta-coordinate titanium atoms in the solid state are rare. There is one other example of a titanium-nitrogen compound which contains five-and hexa-coordinate titanium [7 a, 17 a, 17 e], whereas in diethylaminotitanium trichloride, the only other known crystal structure of an aminotitanium trichloride, titanium is hexa-coordinate as part of an endless chain built by Ti±Cl±Ti bridges [18]. The surroundings of the nitrogen atom are trigonal planar within the experimental error.…”

“…The surroundings of the nitrogen atom are trigonal planar within the experimental error. The bond length d Ti±N = 182.8(2) pm in 3 a is short [7,17,18] and indicates NTi (pd)p interactions. The various bond lengths d Ti±Cl (see Fig.…”

Ammonothermal Synthesis of a Mesoporous Si−Ti−N Composite Material from a Single-Source Precursor

“…The titanium atoms are coordinated in a distorted tetrahedron by two nearly planar terminal silylamindo ligands and two slightly pyramidal bridging silylimido ligands. The two endocyclic Ti−N distances are 1.99 Å, which can be ascribed to the formation of a Ti−N single bond. , The two other endocyclic Ti−N distances are both 1.879 Å, which are probably shortened by d π − p π interactions. 19c, Unsymmetrically bridging imido ligands have also been observed in other dimeric transition metal amides such as [(NSi(NMe 2 ) 3 )(Ti(NMe 2 ) 2 ] 2 19c and [(CH 3 ) 2 (t-BuN)M] 2 (μ-t-BuN) 2 (M = Mo, W). , The exocyclic Ti−N distances are 1.92 and 1.91 Å, respectively.

2 ORTEP 36 plot of the crystal structure of compound 1 .

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