Organogermanium Compounds of the Main Group Elements

Zaitsev, Kirill V.

doi:10.1002/9781119613466.ch2

Cited by 3 publications

(6 citation statements)

References 696 publications

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“…The Ge−C Ph bond lengths were almost constant (1.951–1.958 Å) in these structures and only slightly larger than the Ge‐C N bonds (1.936–1.943 Å) in triazolyl fragments, indicating a smaller steric volume of the triazolyl groups. In general, these bond lengths are typical of Ge compounds [37] . A more exact comparison of the structural parameters of 6 , 9 , and 10 with Ph 3 Ge−GePh 3 , performed by Dräger et al.…”

Section: Resultsmentioning

confidence: 99%

1,2‐Bis(triazolyl)tetraphenyldigermanes: Synthesis, Structure and Properties

Zaitsev,

Veshchitsky,

Oprunenko

et al. 2023

Chemistry An Asian Journal

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Using the [3+2] cycloaddition reaction of [HC≡C‐GePh2‐]2 (1) and a number of RCH2N3, this work described the synthesis of a series of novel heterocyclic digermanes, bitriazoles [1,4‐C2HN3(CH2R)GePh2‐]2, 2‐12 (R = Ph, p‐Tol, p‐C6H4NMe2, p‐C6H4OMe, p‐C6H4Br, m‐C6H4NO2, 2‐Naphth, CH2‐p‐OC6H4CHO, CH2‐p‐OC6H4COOMe, CH2P(O)(OEt)2, COOEt), difficult to produce by other methods. The structural peculiarities of these compounds were studied in detail by NMR spectroscopy and by XRD analysis (for 6, 9 and 10). The properties of 1‐12 were studied by UV/vis and luminescence emission spectroscopy, electrochemistry and DFT calculations, indicating an effective conjugation in their molecules.

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Section: Resultsmentioning

confidence: 99%

1,2‐Bis(triazolyl)tetraphenyldigermanes: Synthesis, Structure and Properties

Zaitsev,

Veshchitsky,

Oprunenko

et al. 2023

Chemistry An Asian Journal

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“…Water and THF were mixed, providing a homogeneous solution. Germoxane-type species, Ge-O-Ge, were subsequently formed due to the low stability of intermediate Ge-OH derivatives [29], which is typical of group 14 elements in the case of sterically unhindered substituents at the central atom. Among other known methods for the synthesis of R3Ge-O-GeR3 [29], the actions of aqueous NaOH [30] or Ag2CO3 [31] on R3GeHal is the simplest method.…”

Section: Resultsmentioning

confidence: 99%

“…Germoxane-type species, Ge-O-Ge, were subsequently formed due to the low stability of intermediate Ge-OH derivatives [29], which is typical of group 14 elements in the case of sterically unhindered substituents at the central atom. Among other known methods for the synthesis of R3Ge-O-GeR3 [29], the actions of aqueous NaOH [30] or Ag2CO3 [31] on R3GeHal is the simplest method. It should be noted that the high yields of the isolated products 1 and 2 (84-86%) indicate the high stability of Ge-C bonds in these Ar derivatives.…”

Section: Resultsmentioning

confidence: 99%

Structural Motifs in Aryl Organogermanium Ge-O Derivatives for Material Design

Zaitsev,

Makarov,

Oprunenko

et al. 2023

IJMS

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The aim of this work was to understand the main structural features and ways of formation of Ge-O bonds in organogermanium compounds under the conditions of ArnGeHal4-n (Hal = halide) hydrolysis. The structural types of these compounds were considered, providing 11 blocks (A–K). The molecular structures of the novel compounds [(p-FC6H4)3Ge]2O (1), [(p-F3CC6H4)3Ge]2O (2), and cyclo-[(p-F3CC6H4)2GeO]4 (3) were studied through XRD (X-ray diffraction) analysis. The molecular structure of [(p-F3CC6H4)3GeO]4Ge (4), representing a novel structural type, was also investigated. The data presented in this study will be important in the design of materials with useful properties based on group 14 element derivatives with element–oxygen bonding.

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“…In continuation of our research (see above, Schemes 1 and 3) into germylenes [33][34][35][42][43][44], this work presents our theoretical results on their synthesis to understand how the oxidation state of the central atom is regulated by the steric properties of organic ligands (1-H, 1-Me vs. 2-H, 2-Me), the oxidation state of which remains unchanged. In continuation of our research (see above, Schemes 1 and 3) into germylenes [33][34][35][42][43][44], this work presents our theoretical results on their synthesis to understand how the oxidation state of the central atom is regulated by the steric properties of organic ligands (1-H, 1-Me vs. 2-H, 2-Me), the oxidation state of which remains unchanged.…”

Section: Introductionmentioning

confidence: 93%

“…Tetrylenes [3][4][5][6][7]-heavier carbene analogs-have recently attracted significant attention [8][9][10][11][12][13][14][15][16][17][18][19][20]), primarily due to their possible application as analogs of transition metals in catalysis [21][22][23], in activation of small molecules [24][25][26][27][28][29][30], as ligands [31,32], in possible synthesis of derivatives with E-E bonds [33][34][35], reagents for synthesis [36][37][38][39] or precursors [40][41][42] in material chemistry. These species are reactive and unstable; to stabilize them, the introduction of bulky groups (kinetic stabilization) or polydentate ligands (thermodynamic stabilization) is used.…”

Section: Introductionmentioning

confidence: 99%

Germanium Complexes with ONO Tridentate Ligands: O-H Bond Activation Control According to DFT Calculations

Zaitsev

Trubachev

Полещук

2023

IJMS

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Polydentate ligands are used for thermodynamic stabilization of tetrylenes—low-valent derivatives of Group 14 elements (E = Si, Ge, Sn, Pb). This work shows by DFT calculations how the structure (the presence or absence of substituents) and type (alcoholic, Alk, or phenolic, Ar) of tridentate ligands 2,6-pyridinobis(1,2-ethanols) [AlkONOR]H2 and 2,6-pyridinobis(1,2-phenols) [ArONOR]H2 (R = H, Me) may affect the reactivity or stabilization of tetrylene, indicating the unprecedented behavior of Main Group elements. This enables the unique control of the type of the occurring reaction. We found that unhindered [ONOH]H2 ligands predominantly led to hypercoordinated bis-liganded {[ONOH]}2Ge complexes, where an E(+2) intermediate was inserted into the ArO-H bond with subsequent H2 evolution. In contrast, substituted [ONOMe]H2 ligands gave [ONOMe]Ge: germylenes, which may be regarded as kinetic stabilized products; their transformation into E(+4) species is also thermodynamically favorable. The latter reaction is more probable for phenolic [ArONO]H2 ligands than for alcoholic [AlkONO]H2. The thermodynamics and possible intermediates of the reactions were also investigated.

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Organogermanium Compounds of the Main Group Elements

Cited by 3 publications

References 696 publications

1,2‐Bis(triazolyl)tetraphenyldigermanes: Synthesis, Structure and Properties

1,2‐Bis(triazolyl)tetraphenyldigermanes: Synthesis, Structure and Properties

Structural Motifs in Aryl Organogermanium Ge-O Derivatives for Material Design

Germanium Complexes with ONO Tridentate Ligands: O-H Bond Activation Control According to DFT Calculations

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