Genesis and Evolution in the Chemistry of Organogermanium, Organotin and Organolead Compounds

Воронков, М. Г.; Абзаева, К. А.

doi:10.1002/9780470682531.pat0253

Patai's Chemistry of Functional Groups 2009

DOI: 10.1002/9780470682531.pat0253

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Genesis and Evolution in the Chemistry of Organogermanium, Organotin and Organolead Compounds

М. Г. Воронков

К. А. Абзаева

Abstract: Introduction Organogermanium Compounds Organotin Compounds Organolead Compounds Conclusion

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Cited by 2 publications

References 707 publications

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Theoretical descriptions of novel triplet germylenes M1-Ge-M2-M3 (M1 = H, Li, Na, K; M2 = Be, Mg, Ca; M3 = H, F, Cl, Br)

Kassaee

Ashenagar

2018

J Mol Model

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In a quest to identify new ground-state triplet germylenes, the stabilities (singlet-triplet energy differences, ΔE) of 96 singlet (s) and triplet (t) M-Ge-M-M species were compared and contrasted at the B3LYP/6-311++G**, QCISD(T)/6-311++G**, and CCSD(T)/6-311++G** levels of theory (M = H, Li, Na, K; M = Be, Mg, Ca; M = H, F, Cl, Br). Interestingly, F-substituent triplet germylenes (M = F) appear to be more stable and linear than the corresponding Cl- or Br-substituent triplet germylenes (M = Cl or Br). Triplets with M = K (i.e., the K-Ge-M-M series) seem to be more stable than the corresponding triplets with M = H, Li, or Na. This can be attributed to the higher electropositivity of potassium. Triplet species with M = Cl behave similarly to those with M = Br. Conversely, triplets with M = H show similar stabilities and linearities to those with M = F. Singlet species of formulae K-Ge-Ca-Cl and K-Ge-Ca-Br form unexpected cyclic structures. Finally, the triplet germylenes M-Ge-M-M become more stable as the electropositivities of the α-substituents (M and M) and the electronegativity of the β-substituent (M) increase.

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Theoretical descriptions of novel triplet germylenes M1-Ge-M2-M3 (M1 = H, Li, Na, K; M2 = Be, Mg, Ca; M3 = H, F, Cl, Br)

Kassaee

Ashenagar

2018

J Mol Model

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Separation of Benzyl Derivatives of Germanium for HPLC

Kluska¹,

Pypowski²,

Chrząścik³

et al. 2010

Journal of Chromatographic Science

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The paper presents interactions of mono-, di-, tri-, and tetrabenzyl derivatives of germanium with stationary phase surface and results from these processes of determination. As a final result of the work, optimal conditions of chromatographic separation and determination of these compounds by high-performance liquid chromatography (HPLC) method are proposed. During investigations, different types of stationary phase (including octadecyl, octyl, and chemically bonded aryl phases) and mobile phases are considered. As a result of the investigation, the highest selectivity is showed chemically by bonded aryl stationary phase combined with a mobile phase consisting of acetonitrile (capacity factors of di-, tri-, and tetrabenzyl derivatives of germanium k(1) = 0.86, k(2) = 2.53, k(3) = 6.45). However, octadecyl phase, which is considered as reference phase, exhibits the lowest separation factors of determined benzylgermanium compounds (k(1) = 9.12, k(2) = 37.62, k(3) = 70.43).

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Genesis and Evolution in the Chemistry of Organogermanium, Organotin and Organolead Compounds

Abstract: Introduction Organogermanium Compounds Organotin Compounds Organolead Compounds Conclusion

Cited by 2 publications

References 707 publications

Theoretical descriptions of novel triplet germylenes M1-Ge-M2-M3 (M1 = H, Li, Na, K; M2 = Be, Mg, Ca; M3 = H, F, Cl, Br)

Theoretical descriptions of novel triplet germylenes M1-Ge-M2-M3 (M1 = H, Li, Na, K; M2 = Be, Mg, Ca; M3 = H, F, Cl, Br)

Separation of Benzyl Derivatives of Germanium for HPLC

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