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• W2002617821 abstract "The photochemical reactions of [{M(cp)(CO)3}2](M = Mo or W, cp =η-C5H5) with [Ru3(CO)9BH5]1 or [Ru3H(CO)9(B2H5)]2 have been investigated. The observed cluster products arise by either the addition of a {(cp)M(CO)2} fragment to the Ru3B cluster core of 1 with associated hydrogen loss or by substitution of one {(cp)M(CO)2} for a {BH2} fragment in either 1 or 2 and, for M = W only, by the substitution of two {BH2} fragments. An assessment as to whether the reaction pathways may be reasonably described in terms of isolobal fragment replacement is presented; Fenske–Hall quantum-chemical calculations are used to show that some degree of semi-bridging character from the Group 6 metal carbonyl ligands to the triruthenium framework necessarily follows as the {(cp)M(CO)2}(M = Mo or W) fragment is introduced in place of the {BH2} unit in 1. Two products have been characterized by single-crystal X-ray crystallography: [MoRu3(cp)H3(CO)11]4, monoclinic, space group P21/c, a= 16.668(5), b= 14.575(6), c= 18.319(4)Å, β= 102.85(2)°, Z= 8; R(F)= 0.0408; [WRu3(cp)H(CO)11(BH)]5, monoclinic, space group P21/c, a= 17.328(6), b= 7.641(3), c= 17.924(8)Å, β= 114.92(3)°, Z= 4, R(F)= 0.1210. Compound 4 exhibits a tetrahedral metal core and is related to 1 by the replacement of an apical {BH} unit and one endo-hydrogen atom by a {(cp)Mo(CO)2} group. Compound 5 consists of a butterfly framework of metal atoms with the tungsten atom occupying a wingtip site and is the first heterometallic butterfly cluster containing a semi-interstitial boron atom to be structurally characterized. Partial structural data have been obtained for a third product, [W2Ru3(cp)2(CO)13] and the presence of a trigonal bipyramidal cluster core with two equatorial tungsten site has been confirmed. This isomer is found not to be that which is dominant in solution." @default.
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• W2002617821 date "1992-01-01" @default.
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• W2002617821 title "Metal fragment addition and substitution reactions of [Ru₃(CO)₉BH₅] and [Ru₃H(CO)₉(B₂H₅)]: molecular structures of [WRu₃(cp)H(CO)₁₁(BH)] and [MoRu₃(cp)H₃(CO)₁₁](cp =η-C₅H₅)" @default.
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• W2002617821 doi "https://doi.org/10.1039/dt9920002855" @default.
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