540 Chemie und zugeordnete Wissenschaften
Refine
Year of publication
- 1989 (1) (remove)
Document Type
- Article (1)
Language
- German (1)
Has Fulltext
- yes (1)
Is part of the Bibliography
- no (1)
Keywords
- Crystal Structure (1)
- IR Spectra (1)
- Imido Complex of Tantalum (1)
- Synthesis (1)
Institute
The title compound has been prepared by the reaction of N,N,N′-tris(trimethylsilyl)benzamidine with tantalum pentachloride in CH2Cl2 suspension, forming amber-coloured, moisturesensitive crystals, which were characterized by an X-ray structure determination. Space group P 21/n, Z = 2, 4895 observed independent reflexions, R = 0.059. Lattice dimensions (-65°C): a = 1165.2(6), b = 1335.4(6), c = 1629.0(7) pm, β = 93.23(4)°. The complex forms centrosymmetric molecules dimerized via chloro bridges TaCl2Ta with TaCl bond lengths of 247.2(2) and 277.1(2) pm, the longer one being in trans-position to the imido group, which can be formulated as [xxx] (bond lengths Ta=Ν = 183.5(8), C=N = 134(1) pm, bond angle TaNC = 162.7(7)°).