Fe_3(CO)_(12)与P(NEt_2)_2Cl的反应——两核和三核铁羰基簇合衍生物的合成和晶体结构

The Reaction of Fe_3(CO)u with P(NEt_2)_2Cl-Synthesis and Crystal Structures of Dinuclear and Trinuclear Iron Carbonyl Clusters

Fe_3(CO)_(12)与配位基前体P(NEt_2)_2Cl反应,给出4个新的两核和三核铁羰基簇合衍生物:Fe_2(CO)_6(μ-Cl)[μ-P(NEt_2)_2](Ⅰ),Fe_2(CO)_6[μ-P(NEt_2)_2]_2(Ⅱ),Fe_3(CO)_9(μ-CO)(μ_3-PNEt_2)(Ⅲ)和Fe_3(CO)_9(μ_3-PNEt_2)[P(NEt_2)_3](Ⅳ)。在反应期间,配前体分子中的P-Cl和P-N键劈开,形成的分子片Cl、PNEt_2、P(NEt_2)_2和P(NEt_2)_3作为配体与铁羰合物重新组建成上述簇合物。利用X射线衍射法测定了它们的晶体结构。Ⅰ属三斜晶系,P1空间群,晶胞参数a=0.8745(6)nm,b=0.9601(7)nm,c=1.3996(10)nm,α=74.131(11)°,β=79.480(12)°,γ=69.727(12)°,V=1.0553(13)nm^3,D_c=1.543g·cm^(-3),Z=2,R=0.0443,wR=0.0831。Ⅱ属正交晶系,Pbcn空间群,晶胞参数a=1.0153(3)nm,b=1.7543(5)nm,c=1.6860(5)nm,V=3.0031(15)nm^3,D_c=1.394g·cm^(-3),Z=4,R=0.0519,wR=0.1035。Ⅲ属单斜晶系,P2_1/c空间群,晶胞参数a=1.0280(5)nm,b=1.2113(5)nm,c=1.9192(7)nm,β=93.560(7)°,V=2.1366(16)nm^3,D_c=1.712g·cm^(-3),Z=4。Ⅳ属单斜晶系,Cc空间群,晶胞参数a=1.5875(7)nm,b=1.0359(5)nm,C=2.1919(9)nm,β=101.266(8)°,V=3.535(3)nm^3,Dc=1.443g·cm^(-3),Z=4。Ⅰ和Ⅱ为两核铁簇,其簇骨架Fe_2PCl和Fe_2P_2呈蝶状。Ⅲ和Ⅳ?

The reaction of Fe-3(CO)(12) with P(NEt2)(2)Cl, gave four novel dinuclear and trinuclear phosphorus clusters: (Fe-2 (CO)(6)(mu-Cl) [mu-P(NEt2)(2)] (I), Fe-2 (CO)(6)[mu-P (NEt2)(2)] (II), Fe-3 (CO)(9)(mu-CO) (mu(3)-PNEt2) (III) and Fe-3 (CO)(9)(mu(3)-PNEt2) [P(NEt2)(3)] (IV). During the reaction, the ligand precursor was cleaved or formed in its P-Cl and P-N bonds to give the fragments Cl, PNEt2, P(NEt2)(2) and P(NEt2)(3), that coordinated to the iron atoms to form the clusters as listed above. The crystal structures of I similar to IV have been determined by X-ray diffraction. Crystal data for I: triclinic. (P (1) over bar), a = 0. 8745(6) nm, b = 0. 9601(7) nm, c = 1.3996(10) nm, alpha = 74.131(11)degrees, beta = 79.480(12)degrees, gamma = 69.727(12)degrees, V= 1.0553(13) nm(3), D-c = 1.543g (.) cm(-3), Z = 2, R = 0.0443, wR = 0.0831. Crystal data for II: orthorhombic (Pbcn), a = 1.0153(3) nm, b = 1.7543(5) nm, c = 1.6860(5) nm, V = 3.0031(15) nm(3), D-c = 1.394g (.) cm(-3), Z = 4, R = 0.0519, wR = 0.1035. Crystal data for III: Monoclinic (P2(1)/c), a = 1.0280(5) nm, b = 1.2113(5) nm, c = 1.7192(7) nm, beta = 93.560(7)degrees, V = 2.1366(16) nm(3), D-c = 1.712g (.) cm(-3), Z = 4. Crystal data for IV: monoclinic (Cc), a = 1.5875(7) nm, b = 1.0359(5) nm, c = 2.1919(9) nm, beta = 101.266(8), V = 3.535(3) nm(3), D-c = 1.443g (.) cm(-3), Z = 4. I and II are the dinuclear iron clusters. The bridging P and Cl atoms with Fe atoms form respectively a folded Fe2PCl or Fe2P2 core in butterfly shape. III and IV are trinuclear iron clusters, in whish, Fe3P core containing face bridging ligand mu(3)-PNEt2 is triangular pyramid geometry. CCDC: I, 211253; II, 211254; III, 211255; IV, 211252.