Kristallstruktur, thermische Ausdehnung und Farbwechsel von (Me3Ge)2Sb-Sb(GeMe3)2 und anderen Distibanen

Roller, Stefan; Dräger, Martin; Breunig, H. J.; Ateş, M.; Güleş, Sabahittin

doi:10.1016/0022-328x(89)85360-4

Cited by 27 publications

(15 citation statements)

References 16 publications

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“…Compounds 9 – 12 belong to the very short list of structurally characterized metal‐substituted dipnictanes. Aside from homoleptic germyl‐ and stannyl‐substituted distibanes [(Me 3 Ge) 2 Sb] 2 [ 37 ] and [(Me 3 Sn) 2 Sb] 2 , [ 38 ] there are only two additional examples: the homoleptic bis iron‐substituted diarsane [CpFe(CO) 2 (Ph)As] 2 [ 39 ] as well as the diarsenide‐dione bridged complex, [Et 3 P(Cl)Pt{ t Bu(O)C}As] 2 , [ 40 ] respectively.…”

Section: Resultsmentioning

confidence: 99%

Size Matters: Synthesis of Group 13 Metal‐Substituted Dipnictanes by E‐C Bond Homolysis

2020

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Pnictanes Cp*(Ph)ECl (E = As 1, Sb 2; Cp* = C5Me5) react with group 13 diyls LM (M = Al, Ga, In; L = HC[C(Me)N(Dip)]2, Dip = 2,6‐iPr2C6H3) with oxidative addition of the E‐Cl bond to a unique series of metalylpnictanes [L(Cl)M](Ph)ECp* (E = As, M = Al 3, Ga 4, In 5; E = Sb, M = Al 6, Ga 7, In 8). Thermal treatment of 4 and 6–8 results in homolytic E‐C bond scission with Cp* radical liberation, yielding the corresponding dipnictanes {[L(Cl)M](Ph)E}2 (E = As, M = Ga 9; E = Sb, M = Al 10, Ga 11, In 12). Compounds 1–12 were characterized by NMR (1H, 13C) and IR spectroscopy, elemental analysis, and single‐crystal X‐ray diffraction (3–12).

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Section: Resultsmentioning

confidence: 99%

Size Matters: Synthesis of Group 13 Metal‐Substituted Dipnictanes by E‐C Bond Homolysis

2020

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“…A particularly interesting aspect of several distibines is their thermochromic behavior. Distibines of the type [R 2 Sb] 2 (R = alky and aryl, EMe 3 (E = Si, 19 Ge, 19 Sn 20 )) have therefore been studied intensively by UV–vis spectroscopy. Although the origin for the thermochromic property is not completely clear, one of the explanations involves intermolecular alignment in the solid state with rather short Sb···Sb distances (ca.…”

Section: Resultsmentioning

confidence: 99%

Oligosilanylated Antimony Compounds

Zitz¹,

Gatterer²,

Reinhold

et al. 2015

Organometallics

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By reactions of magnesium oligosilanides with SbCl3, a number of oligosilanylated antimony compounds were obtained. When oligosilanyl dianions were used, either the expected cyclic disilylated halostibine was obtained or alternatively the formation of a distibine was observed. Deliberate formation of the distibine from the disilylated halostibine was achieved by reductive coupling with C8K. Computational studies of Sb–Sb bond energies, barriers of pyramidal inversion at Sb, and the conformational behavior of distibines provided insight for the understanding of the spectroscopic properties.

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“…[5][6][7] In addition, some dipnictanes are thermochromic, which refers to the color change that occurs upon melting. [8][9][10][11][12][13][14] The thermochromic effect most likely results from the breakage of intermolecular metal•••metal interactions, which exist in the solid state but disappear in the liquid state. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] Apart from the identification of attractive intermolecular interactions in such molecules, their coordination chemistry has also been studied.…”

Section: Introductionmentioning

confidence: 99%

“…Dipnictanes R 2 E–ER 2 contain a central E–E bond and the group 15 elements adopt the oxidation state II. The first compound of this type, Me 4 As 2 , which is known as “ fuming arsenical liquid ” or “ Cacodyl ”, was prepared by Louis Cadet de Gassicourt in 1760 and later on by Robert Bunsen, whereas the heavier congeners Me 4 Sb 2 and Me 4 Bi 2 were prepared in the early 1930s. , Since distibanes and dibismuthanes exhibit rather weak Sb–Sb and Bi–Bi bonds, they have been studied as promising starting reagents for the synthesis of persistent Sb- and Bi-centered radicals by thermally activated homolytic bond cleavage reactions. − In addition, some dipnictanes are thermochromic, which refers to the color change that occurs upon melting. − The thermochromic effect most likely results from the breakage of intermolecular metal···metal interactions, which exist in the solid state but disappear in the liquid state. − …”

Section: Introductionmentioning

confidence: 99%

Structure and Reactivity of 1,8-Bis(naphthalenediyl)dipnictanes

et al. 2019

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Syntheses and solid-state structures of diarsane Naph2As2 (Naph = 1,8-naphthalenediyl, 1) and (Naph)5Sb4Cl2 3 are reported and the σ-donor capacity of Naph2E2 (E = As 1, Sb 2) was studied in reactions with (coe)Cr(CO)5 (coe = Z-cyclooctene), yielding Naph2As2[Cr(CO )5]2 (4) and Naph2E2Cr(CO)5 (E = As 5, Sb 6). In contrast, reactions of 1 and 3 with Me2SAuCl proceed with oxidation and formation of elemental gold as well as Naph2(AsCl)2 ( 7) and [NaphSbCl2]2 8. All complexes were characterized by elemental analyses, heteronuclear ( 1 H, 13 C) NMR and FT-IR spectroscopy as well as single crystal X-ray diffraction. Intermolecular E•••π interactions (E = As, Sb), which were observed in 7 and 8, were quantified by use of density functional theory and local coupled cluster electronic structure theory calculations. These allow to assess the nature and relative importance of covalent and non-covalent interactions and illustrate how dispersion interactions change with the electronic structure of the series of compounds.

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Kristallstruktur, thermische Ausdehnung und Farbwechsel von (Me3Ge)2Sb-Sb(GeMe3)2 und anderen Distibanen

Cited by 27 publications

References 16 publications

Size Matters: Synthesis of Group 13 Metal‐Substituted Dipnictanes by E‐C Bond Homolysis

Size Matters: Synthesis of Group 13 Metal‐Substituted Dipnictanes by E‐C Bond Homolysis

Oligosilanylated Antimony Compounds

Structure and Reactivity of 1,8-Bis(naphthalenediyl)dipnictanes

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