A Novel Full-Sandwich Lanthanacarborane Complex Bearing an η7-Carboranyl Ligand, {{[η7-Me2Si(C13H9)(C2B10H11)]2YbIII}2YbII}{Na8(THF)20}

Wang, Shaowu; Li, Hung‐Wing; Xie, Zuowei

doi:10.1021/om0102605

Cited by 26 publications

(12 citation statements)

References 18 publications

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“…Reaction of equimolar amounts of 116, YbCl 3 , Na metal, and Me 3 NHCl in THF results in formation of {{[η 7 -Me 2 Si(C 13 H 9 )(C 2 B 10 H 11 )] 2 Yb III } 2 Yb II }{Na 8 -(THF) 20 } (117). 196 Addition of Me 3 NHCl is essential for isolation of 117. It is assumed that the ammonium salt protonates the appended fluorenyl anion leaving the core structure intact.…”

Section: R 2 C 2 B 10 Derivativesmentioning

confidence: 99%

Synthesis and Structural Chemistry of Non-Cyclopentadienyl Organolanthanide Complexes

2002

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Over the years one major challenge has remained in organolanthanide chemistry: the synthesis of homoleptic alkyl and aryl complexes. The simplest organometallic compounds of the rare earths are the species LnR 2 or LnR 3 with the rare earth metals in their common oxidation states Ln 2+ and Ln 3+ which imply the coordination of only two or three ligands to the metal center. This is usually insufficient to meet the lanthanides' demands of steric saturation through high coordination numbers.Hence for a long time, only indirect evidence could be found for the existence of simple homoleptic organolanthanide compounds; the isolation and characterization of compounds belonging to this class were first achieved recently using pentafluorophenyl for Ln 2+ derivatives 12 and very bulky alkyl ligands for Ln 3+ species. [13][14][15] Especially for alkyls, very little structural data are available for compounds without any trimethylsilyl-substituted ligands which generally ensure higher stability. But nevertheless, due to the difficulties of their synthesis and their high reactivity alkyls and aryls still represent an interesting class of compounds. 16 Homoleptic σ-Alkyl ComplexesShortly after the synthesis of the first divalent solvent-free Ln alkyl, [(Me 3 Si) 3 C] 2 Yb, 17 the Eu analogue was prepared similarly by the reaction of EuI 2 and KC(SiMe 3 ) 3 in benzene. 18 It also features the bent structure displayed by the Yb complex but with a slightly smaller C-Eu-C angle (C-Eu-C ) 136°, C-Yb-C ) 137°) and longer Eu-C bonds (Eu-C ) 261 pm, Yb-C ) 249/250 pm). Salt metathesis was then again applied successfully to synthesize the first divalent Sm alkyl, Sm[C(SiMe 3 ) 2 (SiMe 2 OMe)] 2 (THF) Frank T. Edelmann was born in Hamburg, Germany, in 1954. He studied chemistry from 1974 to 1979 at the University of Hamburg, where he obtained his Diplom in 1979 and doctoral degree in 1983. His Ph.D. thesis entitled "The chemistry of the tricarbonyl(fulvene) chromium complexes" was carried out under the supervision of Prof. Ulrich Behrens. This was followed by two years (1983−1985) of postdoctoral research as a Feodor Lynen Fellow of the Alexander-von-Humboldt Foundation in the groups of Professors Josef Takats (

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Section: R 2 C 2 B 10 Derivativesmentioning

confidence: 99%

Synthesis and Structural Chemistry of Non-Cyclopentadienyl Organolanthanide Complexes

2002

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“…The first full sandwich lanthanacarborane containing a η 7 -carboranyl ligand, {{[η 7 -Me 2 Si(C 13 H 9 )(C 2 B 10 H 11 )] 2 Yb} 2 Yb}{Na 8 (THF) 20 } has been prepared, which is a rare example of a lanthanide complex supported only by B-H bonds. 56 Synthesis of bulky tetramethylcyclopentadienyl substituted orthocarborane ligands, exemplified by Me 2 Si(C 5 Me 4 H)(C 2 B 10 H 11 ), and their coordination chemistry with various lanthanide metals has been reported. The structures of these complexes are contrasted with the previously reported ones of Cp-functionalised ligands, and it is found that use of the bulky Cp* derived ligands result in complexes that are more unsaturated than with Cp.…”

Section: Carboranesmentioning

confidence: 99%

3 Boron

Weller

2002

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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“…Although they are considered to be weakly coordinating anions, carbaborane compounds may be involved in agostic interactions with diverse metal centres. [30][31][32][33][34][35][36][37][38][39][40] In a recent study we reported a series of coordination complexes (either discrete, 1D or 3D polymers) of Ag(I) and smaller alkane dinitriles…”

Section: Introductionmentioning

confidence: 99%

Exploring Ag⋯H–B interactions in coordination polymers: silver–alkanedinitrile networks with cobalt carbaborane anions

Cunha-Silva

Hardie

2012

CrystEngComm

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Uncommon silver coordination environments occupied exclusively by Ag/H-B interactions, namely Ag/(H-B) 4 and Ag/(H-B) 6 centres, were observed in two novel coordination polymers, [Ag(pim)(Cobdc)][Ag(Cobdc)] (1) (pim ¼ pimelonitrile, CN(CH 2 ) 5 CN, and Cobdc ¼ cobalt(III) bisThe Ag/(H-B) 4 centre was observed in compound 1 and shows a geometry that resembles an extremely distorted tetrahedron, while a highly distorted octahedral centre Ag/(H-B) 6 was found in 2. The two compounds were isolated as crystalline materials, their structures established by single crystal X-ray diffraction and also characterized by CHN elemental analysis and infrared spectroscopy. The compounds 1 and 2 feature neutral 1D and 2D coordination polymers, [Ag(pim)(Cobdc)] 1N and [Ag 3 (sub) 2 (Cobdc) 3 ] 2 N , respectively. Experimental part GeneralAlkane dinitrile ligands pimelonitrile (pim), CN(CH 2 ) 5 CN (Aldrich, 98%), and suberonitrile (sub), CN(CH 2 ) 6 CN (Aldrich,

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A Novel Full-Sandwich Lanthanacarborane Complex Bearing an η⁷-Carboranyl Ligand, {{[η⁷-Me₂Si(C₁₃H₉)(C₂B₁₀H₁₁)]₂Yb^III}₂Yb^II}{Na₈(THF)₂₀}

Abstract: The first full-sandwich lanthanacarborane containing an η 7 -carboranyl ligand was prepared and structurally characterized, which indicates that the arachno-carboranyl ligand can effectively stabilize the high oxidation state of the metal.

Cited by 26 publications

References 18 publications

Synthesis and Structural Chemistry of Non-Cyclopentadienyl Organolanthanide Complexes

Synthesis and Structural Chemistry of Non-Cyclopentadienyl Organolanthanide Complexes

3 Boron

Exploring Ag⋯H–B interactions in coordination polymers: silver–alkanedinitrile networks with cobalt carbaborane anions

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