Results 71 to 80 of about 25,648 (231)

Dilithium Enediamide Derived From a 1,4‐Diaza‐1,3‐diene: Reactivity of a Strongly N‐Basic, Highly C‐Nucleophilic Compound Toward C–H Acids

open access: yesEuropean Journal of Inorganic Chemistry, Volume 29, Issue 20, 17 July 2026.
The lithium enediamide complex 2 with intrinsically inverted C–N bond polarity combines strong basicity with unusual reactivity: deprotonation of malonates enables C–C bond formation without electron transfer. Depending on malonate substitution, electrophilic substitution or addition occurs at the enediamide CC bond.
Muhan Liang   +3 more
wiley   +1 more source

A Mixed Covalent–Supramolecular Interpenetrated Copper–Phosphonate Network

open access: yesZeitschrift für anorganische und allgemeine Chemie, Volume 652, Issue 11, 16 July 2026.
Zigzag Cu–bisphosphonate double strands are connected by dipyridyl linkers to two‐dimensional layers which are organized via hydrogen bonds into a three‐dimensional, two‐fold interpenetrated hydrogen‐bonded framework. A novel copper‐based coordination network [Cu(1,4‐DPB)(H2NBP)] was synthesized via a hydrothermal process using 1,4‐di(pyridin‐4‐yl ...
Marcus N. A. Fetzer   +3 more
wiley   +1 more source

Logika racjonalności. W stronę modalnego platonizmu matematycznego

open access: yesZagadnienia Filozoficzne w Nauce, 2011
In this article Whitehead’s philosophy of mathematics is characterized as a Structural Second-Order Platonism and it is demonstrated that the Whiteheadian ontology is consistent with modern formal approaches to the foundation of mathematics.
Piotr Wilczek
doaj  

Moral Implications of Augustine's Philosophical and Spiritual Journey in his Confessiones

open access: yesCommunications, 2015
Aurelius Augustinus, though born to a Christian mother, had undergone a long and tedious spiritual journey in his search for truth and meaning. Youthful hedonism gave way to Skepticism, Manichaeism, and later on to Neo-Platonism as he searched for ...
Michal Valco, Roman Kralik, Lee Barrett
doaj   +1 more source

“Platonismo sociale”? In difesa del realismo fenomenologico in ontologia sociale

open access: yesRivista di Estetica, 2012
In my paper, I will address two issues on the characterisation of social objects as subject-dependent objects: (i) Does phenomenological realism imply Platonism in social ontology?
Francesca De Vecchi
doaj   +1 more source

Creating new concepts in mathematics: freedom and limitations. The case of Category Theory

open access: yesZagadnienia Filozoficzne w Nauce, 2020
In the paper we discuss the problem of limitations of freedom in mathematics and search for criteria which would differentiate the new concepts stemming from the historical ones from the new concepts that have opened unexpected ways of thinking and ...
Zbigniew Semadeni
doaj  

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