Synthesis and structure of dithiagermocane containing a spiro eight-membered ring

Chen, Deng‐Hai; Chiang, Hung-Cheh; Ueng, Chuen‐Her

doi:10.1016/s0020-1693(00)82890-x

Cited by 20 publications

(8 citation statements)

References 8 publications

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“…Disappearance of both OH and SH signals confirms the formation of the compounds. The 1 H NMR spectrum exhibit 13 characteristic peaks and peak multiplicities. The signals due to SCH 2 and OCH 2 are observed in the range δ 2.82-δ 3.10 and δ 3.00-δ 3.80 ppm respectively.…”

Section: Resultsmentioning

confidence: 99%

“…13 C NMR spectra: The 13 C NMR spectra of the above derivatives exhibit 13 -SCH 2 and -OCH 2 signals in the region δ 30.42-δ 34.68 ppm and δ 60.50-δ 64.93 ppm, respectively, indicate bonding of the ligand moiety to germanium(IV) through S and O of the ligand. Signals of alkoxy carbons (from 1:1 complexes) are also obtained at their expected positions.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, in view of the above attracting features of germanium chemistry, we are reporting the synthesis and characterization of some new germanium(IV) derivatives of the type GeGn(OR)4-2n along with only two known compounds 13 via different synthetic route.…”

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confidence: 99%

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Synthesis and Characterization of Some New Metallo-Organic Derivatives of Germanium(IV)

Samuel¹,

Tummalapalli²,

Giri³

et al. 2014

Asian J. Chem.

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In spite of the extensive synthetic and structural studies of metallo-organic derivatives of group 14 elements, germanium has received less attention 1,2. Metallo-organic compounds of germanium have been the subject of considerable research interest due to its diverse structural features 3 and wide range of technological applications in industries 4. These types of complexes have been well established as good precursors for metal oxide ceramic materials using sol-gel/MOCVD processes 5. Germanium alkoxides as well as its other modified derivatives are quite often used to fabricate the thin film of germania 6 and its nano-wires containing visible photo luminescent material 7. An appreciable contribution of GeO 2 in borosilicate glasses and in its other analogue glass ceramics has been reported by Darwish et al 8. A biologically active nanocomposite powdered material of magnesium oxide-germanium dioxide has been well documented 9. On the other hand, in addition to the structural variation, very recent coordination complex of gemanium(IV) has been shown as an efficient basic catalyst 10. Though, germanium(IV) complexes are well understood to adopt tetrahedral geometry 11 but, some recent reports of the last decade are revealing the distorted tetrahedral configuration around the germanium(IV) e.g. germanium tetra tertiary butoxide 12 and [Ge{S(CH 2) 2 S(CH 2) 2 S} 2 ] and [Ge{S(CH 2) 2 O(CH 2) 2 S} 2 ] 13. Distortion may be attributed to the formation of the two eight membered chelating rings and to the interaction between germanium and the free oxygen or sulphur of the ligands.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Synthesis and Characterization of Some New Metallo-Organic Derivatives of Germanium(IV)

Samuel¹,

Tummalapalli²,

Giri³

et al. 2014

Asian J. Chem.

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“…16 Penta-and hexacoordinated-derivatives of Ge(IV) with complex organic moieties have also been cited in the literature. [17][18][19] The synthesis and characterisation of Ge(IV) diolates of the type [Ge (OPr i ) 4-2n (O-G-O) n ] (n = 1,2) and the crystal structure of a unique diolato-bridged compound [Ge 2 (O 2 C 2 H 4 ) 4 ], in which the geometry around the germanium atom is distorted trigonal bipyramidal, have been reported. 20 The preparation and the morphology of germanium oxide 6,21 nanofibres from isopropanol solutions of Ge(OPr i ) 4 in presence of a few drops of propionic acid and deionised water have been reported.…”

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confidence: 99%

Synthesis and Characterisation of Modified Germanium (IV) Isopropoxide with Internally Functionalised oximes: Soft Transformation of Some of These to Pure Nano-Sized Germania

Agrawal

Bohra

Nagar

et al. 2007

Journal of Chemical Research

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Reactions of [Ge(OPr i ) 4 ] with internally functionalised oximes in 1:1 and 1:2 molar ratios in refluxing anhydrous benzene yielded complexes of the type [Ge( 7, 8); [Ge(OPr i ) 4-n {ONC(H)C 4 H 3 S-2} n ] (9, 10); [Ge(OPr i ) 4-n {ONC(H)C 5 H 4 N-2} n ] (11, 12) (where n = 1 or 2), All the above monomeric complexes are soluble in organic solvents and have been characterised by elemental analyses and spectroscopy. Thermal and hydrolytic studies of complexes 2, 4 and 8 suggest them to be potential molecular precursors for the synthesis of pure GeO 2 at low temperatures by the sol-gel technique. Powder X-ray diffraction, IR spectral studies as well as SEM images of the GeO 2 indicate formation of pure nano-crystalline hexagonal (a-quartz) germania at 550°C.

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“…1-5 Crystal structures of [Ge{S(CH 2 ) 2 S(CH 2 ) 2 S} 2 ] and [Ge{S(CH 2 ) 2 O(CH 2 ) 2 S} 2 ], containing even some bifunctional potentially tridentate ligands, exhibit tetrahedral geometry around the germanium (IV) atoms, 4 indicating actually bidentate ligation in every case. 1-5 Crystal structures of [Ge{S(CH 2 ) 2 S(CH 2 ) 2 S} 2 ] and [Ge{S(CH 2 ) 2 O(CH 2 ) 2 S} 2 ], containing even some bifunctional potentially tridentate ligands, exhibit tetrahedral geometry around the germanium (IV) atoms, 4 indicating actually bidentate ligation in every case.…”

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confidence: 99%

Synthesis and Spectroscopic Characterisation of Some Neutral Tetracoordinated Germanium (IV) Alkoxyalkanolates

Pathak

Bohra

Mehrotra

2003

Journal of Chemical Research

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Compounds of the type, [Ge(OPri)4-n(OCH2CH2OR)n], (where R = Me, Et, n-Bu and n = 1-4) have been synthesised in high yields by the interactions of germanium tetraisopropoxide with alkoxyalkanols (HOCH2CH2OR) in different stoichiometries in refluxing anhydrous benzene, and are monomeric in refluxing benzene. All these compounds can be purified by distillation under reduced pressure. IR and NMR (1H and 13C) spectral studies indicate a tetrahedral geometry around the germanium atom.

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Synthesis and structure of dithiagermocane containing a spiro eight-membered ring

Cited by 20 publications

References 8 publications

Synthesis and Characterization of Some New Metallo-Organic Derivatives of Germanium(IV)

Synthesis and Characterization of Some New Metallo-Organic Derivatives of Germanium(IV)

Synthesis and Characterisation of Modified Germanium (IV) Isopropoxide with Internally Functionalised oximes: Soft Transformation of Some of These to Pure Nano-Sized Germania

Synthesis and Spectroscopic Characterisation of Some Neutral Tetracoordinated Germanium (IV) Alkoxyalkanolates

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