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The title compound (1), 1-[([mu]-Cl)2Li(TMEDA)]-2,2',4,4'-(SiMe3)4-5,5',6,6'-[([mu]-H)4Ho(TMEDA)([mu]-Cl)2Li(TMEDA)]-1,1'-commo-Ho(2,4-C2B4H4)2.C10H8 (where TMEDA is tetramethylethylenediamine, bis[[mu]-2[kappa]2HB5,HB6: 3(2,3,4,5,6-[eta])-2,4-bis(trimethylsilyl)-2,4-dicarba-nido-hexaborate(6)]tetra-[mu]-chloro-1:2[kappa]4Cl;3:4[kappa]4Cl-tris(N,N,N',N' -tetramethyl-1,2-ethanediamine)-1[kappa]2N,N';2[kappa]2N,N';4[kappa]2N,N'-1,4- dilithium-2,3-diholmium naphthalene solvate, crystallizes in the triclinic space group P\overline{1}. The cluster consists of a HoIII `carbons apart' carborane bent-sandwich complex bridging almost symmetrically to an exo-polyhedral Li(TMEDA) unit via two Cl atoms and, via two B-H(terminal) groups of each opposing C2B3 face, to an exo-polyhedral HoIII(TMEDA) unit that is also linked to another exo-polyhedral Li(TMEDA) group with two Ho-Cl-Li bridges. The centrally located Ho atom is almost symmetrically bonded to two opposing `carbons apart' C2B4 carborane cages with Ho1...Cnt1 2.340, Ho1...Cnt2 2.349Å, Cnt1...Ho1...Cnt2 130.2, Cnt1...Ho1...Cl1 107.1, Cnt1...Ho1...Cl2 107.1, Cnt2...Ho1...Cl1 109.1, and Cnt2...Ho1...Cl2 109.1°, where Cnt is the centroid of the C2B3 face of each.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks ywhobsp, global

hkl

Structure factor file (CIF format)
Contains datablock yw-hobsp

CCDC reference: 126267

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