Chukwu, Roxton; Hunter, Allen D.; Santarsiero, Bernard D. published the artcile< Organometallic complexes with electronic bridges. 6. Novel organometallic complexes containing aromatic azines: synthesis and x-ray crystal structure of 4,6-bis[(η5-cyclopentadienyl)dicarbonyliron] 2-(methylthio)pyrimidine>, Category: pyrimidines, the main research area is iron azine complex; pyridine iron complex; pyrazine iron complex; pyridazine iron complex; pyrimidine iron complex; crystal structure iron pyrimidine complex; mol structure iron pyrimidine complex; safety handling mercury.
The syntheses of 13 monometallic and 4 bimetallic complexes in which (η5-C5H5)Fe(CO)2 (Fp; C5H5 = cyclopentadienyl) groups are bound to substituted pyridine, pyrazine, pyridazine, and pyrimidine rings is described. These species are prepared by metathesis reactions between the appropriate number of equivalent of NaFp and the chloro- or fluoro-substituted azine precursors in 25-95% yields and structural factors affecting these yields are discussed. These new materials have been fully characterized by conventional spectroscopic techniques and are shown to contain Fe-C σ-bonds. The x-ray crystal structure of the title complex confirms that it has the expected structure about the pyrimidine ring. It also reveals that, contrary to expectations from frontier MO theory, the (η5-C5H5)Fe(CO)2 groups shows a preference for orientations in which its mirror plane is perpendicular to that of the pyrimidine ring. The spectroscopic data provide no evidence for the existence of any electronic interaction between the metal centers of the new bimetallic azine bridged complexes having meta substitution geometries.
Organometallics published new progress about Crystal structure. 3921-01-5 belongs to class pyrimidines, and the molecular formula is C4H2Br2N2, Category: pyrimidines.
Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia