TY - JOUR
T1 - Reactions of [Et4N]3[Sb{Fe(CO)4}4] with Alkyl Halides and Dihalides
T2 - Formation of the Alkyl- And the Dialkylantimony-Iron Carbonyl Complexes
AU - Shieh, Minghuey
AU - Sheu, Chii Maw
AU - Ho, Li Fang
AU - Cherng, Jiann Jang
AU - Jang, Li Fing
AU - Ueng, Chuen Her
AU - Peng, Shie Ming
AU - Lee, Gene Hsiang
PY - 1996
Y1 - 1996
N2 - The reactions of [Et4N]3[Sb{Fe(CO)4}4] (1) with RX (R = Me, Et, n-Pr; X = I) in MeCN form the monoalkylated antimony complexes [Et4N]2[RSb{Fe(CO)4}3] (R = Me, 2; R = Et, 4; R = n-Pr, 6) and the dialkylated antimony clusters [Et4N][R2Sb{Fe(CO)4}2] (R = Me, 3; R = Et, 5; R = n-Pr, 7), respectively. When [Et4N]3[Sb{Fe-(CO)4}4] reacts with i-PrI, only the monoalkylated antimony complex [Et4N]2[i-PrSb{Fe(CO)4}3] (8) is obtained. The mixed dialkylantimony complex [Et4N][MeEtSb{Fe(CO)4}2] (9) also can be synthesized from the reaction of 2 with EtI. While the reaction with Br(CH2)2Br produces [Et4N]2[BrSb{Fe(CO)4}3] (10), treatment with Cl-(CH2)3Br forms the monoalkylated product [Et4N]2[Cl(CH2)3Sb{Fe(CO) 4}3] (11) and a dialkylated novel antimony-iron complex [Et4N][{μ-(CH2)3}Sb{Fe(CO)4} 3] (12). On the other hand, the reaction with Br(CH2)4Br forms the monoalkylated antimony product and the dialkylated antimony complex [Et4N][{μ-(CH2)4}Sb{Fe(CO)4} 2] (13). Complexes 2-13 are characterized by spectroscopic methods or/and X-ray analyses. On the basis of these analyses, the core of the monoalkyl clusters consists of a central antimony atom tetrahedrally bonded to one alkyl group and three Fe(CO)4 fragments and the dialkyl products are structurally similar to the monoalkyl clusters, with the central antimony bonded to two alkyl groups and two Fe(CO)4 moieties in each case. The dialkyl complex 3 crystallizes in the monoclinic space group P21/c with a = 13.014(8) Å, b = 11.527(8) Å, c = 17.085(5) Å, β = 105.04(3)°, V = 2475(2) Å3, and Z = 4. Crystals of 12 are orthorhombic, of space group Pbca, with a = 14.791(4) Å, b = 15.555(4) Å, c = 27.118(8) Å, V= 6239(3) Å3, and Z = 8. The anion of cluster 12 exhibits a central antimony atom bonded to three Fe(CO)4 fragments with a -(CH2)3- group bridging between the Sb atom and one Fe(CO)4 fragment. This paper discusses the details of the reactions of [Et4N]3[Sb{Fe(CO)4}4] with a series of alkyl halides and dihalides. These reactions basically proceed via a novel double-alkylation pathway, and this facile methodology can as well provide a convenient route to a series of alkylated antimony-iron carbonyl clusters.
AB - The reactions of [Et4N]3[Sb{Fe(CO)4}4] (1) with RX (R = Me, Et, n-Pr; X = I) in MeCN form the monoalkylated antimony complexes [Et4N]2[RSb{Fe(CO)4}3] (R = Me, 2; R = Et, 4; R = n-Pr, 6) and the dialkylated antimony clusters [Et4N][R2Sb{Fe(CO)4}2] (R = Me, 3; R = Et, 5; R = n-Pr, 7), respectively. When [Et4N]3[Sb{Fe-(CO)4}4] reacts with i-PrI, only the monoalkylated antimony complex [Et4N]2[i-PrSb{Fe(CO)4}3] (8) is obtained. The mixed dialkylantimony complex [Et4N][MeEtSb{Fe(CO)4}2] (9) also can be synthesized from the reaction of 2 with EtI. While the reaction with Br(CH2)2Br produces [Et4N]2[BrSb{Fe(CO)4}3] (10), treatment with Cl-(CH2)3Br forms the monoalkylated product [Et4N]2[Cl(CH2)3Sb{Fe(CO) 4}3] (11) and a dialkylated novel antimony-iron complex [Et4N][{μ-(CH2)3}Sb{Fe(CO)4} 3] (12). On the other hand, the reaction with Br(CH2)4Br forms the monoalkylated antimony product and the dialkylated antimony complex [Et4N][{μ-(CH2)4}Sb{Fe(CO)4} 2] (13). Complexes 2-13 are characterized by spectroscopic methods or/and X-ray analyses. On the basis of these analyses, the core of the monoalkyl clusters consists of a central antimony atom tetrahedrally bonded to one alkyl group and three Fe(CO)4 fragments and the dialkyl products are structurally similar to the monoalkyl clusters, with the central antimony bonded to two alkyl groups and two Fe(CO)4 moieties in each case. The dialkyl complex 3 crystallizes in the monoclinic space group P21/c with a = 13.014(8) Å, b = 11.527(8) Å, c = 17.085(5) Å, β = 105.04(3)°, V = 2475(2) Å3, and Z = 4. Crystals of 12 are orthorhombic, of space group Pbca, with a = 14.791(4) Å, b = 15.555(4) Å, c = 27.118(8) Å, V= 6239(3) Å3, and Z = 8. The anion of cluster 12 exhibits a central antimony atom bonded to three Fe(CO)4 fragments with a -(CH2)3- group bridging between the Sb atom and one Fe(CO)4 fragment. This paper discusses the details of the reactions of [Et4N]3[Sb{Fe(CO)4}4] with a series of alkyl halides and dihalides. These reactions basically proceed via a novel double-alkylation pathway, and this facile methodology can as well provide a convenient route to a series of alkylated antimony-iron carbonyl clusters.
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U2 - 10.1021/ic9513393
DO - 10.1021/ic9513393
M3 - Article
AN - SCOPUS:0001188216
SN - 0020-1669
VL - 35
SP - 5504
EP - 5508
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 19
ER -