| Abstract: | Addition of NOBF4 to fac-[PPN][Fe(CO)3(TePh)3] in THF at ambient temperature results in formation of Fe2(μ-TePh)2(NO)4l Fe2(?TePh)2(CO)6 and organic products. Methylation of fac-[PPN][Fe(CO)3- (TePh)3] by Mel or [Me3O][BF4] leads to the known dimer Fe2(μ.-TePh)2(CO)6 and organic products. Fe2(μ-TePh)2(NO)4 crystallizes in the orthorhombic space group P bca, with a = 12.701(5) Å, b = 6.7935(16) Å, c = 21.299(9) Å, V = 1837.8(11) Å3, and Z = 4. The core geometry of Fe2(μ-TePh)2(NO)4 is best described as a Fe2Te2 planar rhombus with Te-Fe-Te bond angle 112.09(4)°. A Fe-Fe bond (length 2.827(2) Å) is proposed for Fe2(μ-TePh)2(NO)4 on the basis of the 18-electron rule. The iron atom adopts a distorted tetrahedral geometry with acute bridge Fe-Te-Fe angles 67.91(3)°, and bridging Fe-Te bond of length 2.53(1) Å. |
