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    ChemInform Abstract: Chemistry of Aryl‐Lead(IV) Tricarboxylates. Reaction with Vinylogous β‐Keto Esters.
    ChemInform (1988)
    Darren J. AcklandJT Pinhey
    Abstract Hagemann's ester (IIa) and the demethyl analogue (VI) (in equilibrium with the isomer (VII)) in Py/CHCl3 or in DMSO undergo regiospecific arylation at C‐1 with aryl‐lead triacetates (I) to yield (III) and (VIII), respectively.
    Lead (geology)
    Citations (0)
    Imine Allylations by Allylic Trichlorotins Derived from α,α‐Diisopropylhomoallylic Alcohols with Tin(II) Chloride and N‐Chlorosuccinimide.
    ChemInform (2003)
    Yoshiro MasuyamaNaoko YamamotoYasuhiko Kurusu
    Abstract For Abstract see ChemInform Abstract in Full Text.
    Imine
    Citations (0)
    ChemInform Abstract: The Thiolate Anion as a Nucleophile. Part 14. Further Reactions of Tin(II) Arenethiolates.
    ChemInform (1989)
    J. J. JesudasonMichael E. Peach
    Abstract The nucleophilic aromatic substitution reactions of the tin(II) arenethiolates (I) with several polyfluoroarenes are compared.
    Substitution reaction
    Citations (0)
    ChemInform Abstract: 4‐(1,4‐Benzoquinonyl‐2)‐1,4‐dihydropyridines as Analogues of Nifedipine.
    ChemInform (1989)
    U. KUCKLAENDERPetra UlmerGabriele Zerta
    Abstract Condensation reaction of the aldehyde (I) with the aminocyclohexenone (II) and subsequent deprotection of the phenolic hydroxy groups yield the decahydroacridinedione (III) which is oxidized with Ag 2 O to form the quinones (IV) or (V) depending on the amount of oxidant employed.
    Condensation reaction
    Citations (0)
    Covalent and ionic species in cationic polymerizations: Rates of exchange
    Makromolekulare Chemie Macromolecular Symposia (1988)
    Stanisław PenczekRyszard Szymański
    Abstract The general kinetic scheme of simultaneous propagation on covalent and ionic species is discussed. There are a few ways of interconversion of covalent and ionic species, and at least two different modes of covalent propagation. This is either a direct inclusion with reformation of covalent species or reaction of covalent species with a monomer, giving ionic species, collapsing then into the covalent species and/or propagating ionically. Significance of these processes for the overall kinetics is discussed; rates of exchange covalent ⇌ ionic and covalent + monomer ⇌ ionic are discussed in more detail on the basis of trityl chloride ionization and ester‐ion equilibria in the polymerization of THF and oxepane.
    Cationic polymerization
    Dynamic Covalent Chemistry
    Citations (9)
    ChemInform Abstract: Dioxygenyl Hexafluoroantimonate: A Useful Reagent for Preparing Cation Radical Salts in Good Yield.
    ChemInform (1987)
    Joseph P. DinnocenzoT. E. Banach
    Abstract In Freon solvents at temperatures ranging from ‐120 ° to ‐145 °C, the title reagent (I) cleanly converts (II)‐(IV) to the corresponding cation radical salts in yields of 97, 89 and 40%, resp. (the salt prepared from (IV) cannot be isolated).
    Freon
    Radical ion
    Citations (0)
    Stability Constants of Dimethyltin Dichloride and Tin Tetrachloride Complexes ofp-Substituted Benzaldehydes, Acetophenones andN,N-Dimethylbenzamides
    Bulletin of the Chemical Society of Japan (1969)
    Gen‐etsu MatsubayashiNoboru NishiiToshio Tanaka
    Tetrachloride
    Titanium tetrachloride
    Citations (3)
    Bonding analysis in ytterbium(ii) distannyl and related tetryls
    Dalton Transactions (2021)
    Peter M. ChappleJulien CartronGhanem HamdounMarie Cordier≈Samia Kahlal
    The syntheses of the ytterbium(II) distannyl [Yb{Sn(SiMe3)3}2·(thf)4] (Yb-Sn) and of its digermyl analogue [Yb{Ge(SiMe3)3}2·(thf)3] (Yb-Ge) are presented. The compounds were characterised by multinuclear high-resolution solution NMR spectroscopy, including 171Yb NMR, and by X-ray diffraction crystallography. The bonding and electronic properties of the two complexes, along with those of the known ytterbium(II) disilyl derivative [Yb{Si(SiMe3)3}2·(thf)3] (Yb-Si) and those of the congeneric calcium distannyl [Ca{Sn(SiMe3)3}2·(thf)4] (Ca-Sn), were investigated in detail by DFT calculations. This analysis points at a primarily ionic Yb-tetrel bonding, with a small covalent contribution, attributed principally to the 5d(Yb) participation. This weak covalent character is found to be larger for the distannyl Yb-Sn than for its lighter Si- and Ge-derivatives. The covalent component is also found to be greater in Yb-Sn than in Ca-Sn, due to the availability of the 5d(Yb) orbitals for bonding.
    Ytterbium
    Derivative (finance)
    Citations (1)
    Phase transition of the doubly disordered Ba1 − x SnxCl1+y F1−y solid solution at high temperature
    Springer eBooks (2007)
    Julie KochuparampilGeorges DénèsAbdualhafed Muntasar
    Tetragonal crystal system
    Citations (0)
    ChemInform Abstract: The Pyridylseleno Group in Organic Synthesis. Part 5. Amidoseleniation of Alkenes.
    ChemInform (1988)
    Akio ToshimitsuGen HayashiKeiji TeraoSakae Uemura
    Abstract A two‐step amidoseleniation reaction of electron‐rich alkenes or their derivatives such as (I) or (VII) affords the β‐acetamido‐alkyl‐2‐pyridyl selenides (V) or (XII) ((XIIb) (no yield given) exists as a ca. 1:1 cis/trans‐mixture).
    Citations (0)