New class of .sigma.-bonded aliphatic aza-macrocyclic complexes of transition metals: synthesis and x-ray crystal structures of nitrogen-bridged [(TiN4C12H24)2] and the oxo-bridged species [(N4C12H25)TiOTi(N4C12H25)]

1983 ◽  
Vol 105 (9) ◽  
pp. 2927-2928 ◽  
Author(s):  
Marilyn M. Olmstead ◽  
Philip P. Power ◽  
Michael Viggiano
Keyword(s):  
Transition Metals ◽  
Crystal Structures ◽  
Macrocyclic Complexes ◽  
X Ray ◽  
New Class ◽  
Complexes Of Transition Metals

Die Kristallstrukturen der isotypen Verbindungen Ba3[MoN4] und Ba3[WN4] / The Crystal Structures of the Isotypic Compounds Ba3[MoN4] and Ba3[WN4]

1991 ◽  
Vol 46 (5) ◽  
pp. 566-572 ◽  
Author(s):  
Axel Gudat ◽  
Peter Höhn ◽  
Rüdiger Kniep ◽  
Albrecht Rabenau
Keyword(s):  
Transition Metals ◽  
Single Crystal ◽  
Crystal Structures ◽  
Structure Type ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ternary Compounds ◽  
The Third

The isotypic ternary compounds Ba3[MoN4] and Ba3[WN4] were prepared by reaction of the transition metals with barium (Ba3N2, resp.) under nitrogen. The crystal structures were determined by single crystal X-ray diffraction: Ba3[MoN4] (Ba3[WN4]): Pbca; Z = 8; a = 1083.9(3) pm (1091.8(3) pm), b = 1030.3(3) pm (1037.5(3) pm), c = 1202.9(3) pm (1209.2(4) pm). The structures contain isolated tetrahedral anions [MN4]6- (M = Mo, W) which are arranged in form of slightly distorted hexagonal layers and which are stacked along [010] with the sequence (···AB···). Two of the three Ba atoms are situated between, the third one is placed within the layers of [MN4]-groups. In this way the structures can be derived from the Na3As structure type.

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