143775-45-5Relevant academic research and scientific papers
syn-Periplanar Bisazo Skeletons - Syntheses and Reactions with Carbonylmetal Complexes
Bahr, Nicolaus,Beckmann, Eberhard,Mathauer, Klemens,Hunkler, Dieter,Keller, Manfred,et al.
, p. 429 - 440 (2007/10/02)
Preparatively useful syntheses for the novel, relatively mobile polycyclic syn-periplanar bisazo polycycles 4 and 5 are based on hydrazine condensation with readily available dienedione 6 and acid-catalyzed rearrangement of bisurazole 12, respectively.In the preferred "closed" and "open" conformations of 4 and 5 the N=N bonds are 314 and 496 pm, respectively, apart (MMX).From the reactions of 4 and 5 with carbonyliron and -ruthenium compounds, complexes are derived which are typical of monoazo ligands 2 = 23, 4*Ru3(CO)9 = 24, 5*2 = 25, 5*Fe2(CO)6*Fe3(CO)9 = 26>.For 21, 23 and 26 crystal structure analyses were performed, confirming i.a. in 26 the unique presence of a Fe2(CO)6 and a Fe3(CO)9 fragment attached to two azo units of the same molecule. Key Words: syn-Periplanar bisazo skeletons / Carbonylmetal complexes / Iron complexes / Ruthenium complexes
