Divergent Electrolysis for the Controllable Coupling of Thiols with 1,2-Dichloroethane: a Mild Approach to Sulfide and Sulfoxide

Organosulfurs are important commodity chemicals and indispensable synthetic intermediates in modern chemistry that traditionally synthesized using metal catalysts, oxidants or strong bases, which caused numerous issues of environment pollutions. The...

Solvent-Controlled Regioselective Arylation of Indoles and Mechanistic Explorations

The ability to manipulate the site selectivity in C–H bond functionalization reactions is an important goal in modern chemistry. Herein, we report a new reaction strategy for the regioselective arylation...

Kajian Logam Dalam Al-Qur’an dan Korelasinya pada Konsep Pemikiran Jabir Bin Hayyan

Kajian logam dalam Al-Qur’an dan korelasinya pada konsep pemikiran jabir bin hayyan berawal dari jabbar bin hayyan yang menjadi salah satu tokoh kimia muslim yang ada di dunia. Ia terkenal dengan gelar yang sangat dibanggakan dunia “The Father of Modern Chemistry”. Beliau menemukan berbagai logam seperti besi, logam bahkan menemukan cara mengatasi korosi pada besi. Jabir juga tidak hanya menyebutkan ilmu kimia saja namun dengan ilmu agama yang sangat mempunyai hubungan dengan ayat-ayat Allah. Penemuanya dengan unsur logam dapat dikaitkan atau mempunyai korelasi dengan Al-Qur’an dimana Allah telah berfirman secara tersurat dan tegas dalam beberapa ayat mengenai unsur logam. Seperti Allah mengatakan bahwa unsur logam yang diciptakan-Nya mempunyai kemampuan atau kekuatan yang sangat hebat sehingga dapat dimanfaatkan dengan baik oleh manusia. Pada penelitian kali ini kami memberi batasan yaitu unsur logam yang kebermanfaatnya sangat mencolok dalam dunia seperti besi, tembaga dan emas. Unsur logam tersebut pada jaman dahulu dimanfaatkan untuk alat-alat perang seperti baju, pedang, panah, perisai dan sebagainya. Lalu tembaga yang dicampurkan dengan unsur logam lain menghasilkan logam yang kokoh dan emas digunakan sebagai alat tukar barang bahkan simbol kekayaan pada jaman Nabi. Seiring berjalanya waktu, banyak ilmuan yang menguji kekuatan unsur logam yang sudah terkandung dalam Al-Qur’an, sehingga pada masa kini telah terbukti bahwa unsur logam telah dimanfaatkan secara mendunia seperi alat-alat berat pada industri terbuat dari besi, dalam kabel listri terbuat dari tembaga dan emas yang mempunyai manfaat yang banyak.

TEACHING OF CARBONIC ACIDS BY ACMEO-COMBINED METHOD

The psychological and pedagogical foundations of developing education are one of the most studied issues in modern chemistry. The difficulty of learning the material taught should be at the level of the development of learners' abilities. Students' learning skills, interest in the subject and motivation should be taken into account when compiling the material. In the process of chemical education, secondary abilities are formed on the basis of abilities that include attention, imagination, memory, thinking and speech. If a chemistry teacher solves the problems of developing these and other skills of his students in a systematic and purposeful way, the average abilities can change significantly. Acmeo-combined method is one of the means of development. The development of students' acmeological thinking in the study of chemistry includes the formation of educational skills and professionalism: to put forward and formulate hypotheses of acmeo education; use existing chemical acmeology and laws to explain events; correctly formulate definitions of concepts; express your thoughts logically and consistently, get accurate results based on facts, and generalize acmeo thinking; make full use of analysis, synthesis, comparison, abstraction, concretization, generalization, systematization and integration.

Noncovalent Bonds through Sigma and Pi-Hole Located on the Same Molecule. Guiding Principles and Comparisons

Over the last years, scientific interest in noncovalent interactions based on the presence of electron-depleted regions called σ-holes or π-holes has markedly accelerated. Their high directionality and strength, comparable to hydrogen bonds, has been documented in many fields of modern chemistry. The current review gathers and digests recent results concerning these bonds, with a focus on those systems where both σ and π-holes are present on the same molecule. The underlying principles guiding the bonding in both sorts of interactions are discussed, and the trends that emerge from recent work offer a guide as to how one might design systems that allow multiple noncovalent bonds to occur simultaneously, or that prefer one bond type over another.

Merging shuttle reactions and paired electrolysis for reversible vicinal dihalogenations

Vicinal dibromides and dichlorides are important commodity chemicals and indispensable synthetic intermediates in modern chemistry that are traditionally synthesized using hazardous elemental chlorine and bromine. Meanwhile, the environmental persistence of halogenated pollutants necessitates improved approaches to accelerate their remediation. Here, we introduce an electrochemically assisted shuttle (e-shuttle) paradigm for the facile and scalable interconversion of alkenes and vicinal dihalides, a class of reactions that can be used both to synthesize useful dihalogenated molecules from simple alkenes and to recycle waste material through retro-dihalogenation. The reaction is demonstrated using 1,2-dibromoethane, as well as 1,1,1,2-tetrachloroethane or 1,2-dichloroethane, to dibrominate or dichlorinate, respectively, a wide range of alkenes in a simple setup with inexpensive graphite electrodes. Conversely, the hexachlorinated persistent pollutant lindane could be fully dechlorinated to benzene in soil samples using simple alkene acceptors.

Recent advances in transition-metal-catalysed asymmetric coupling reactions with light intervention

The advances on transition-metal catalysed asymmetric couplings with light intervention in recent years was summarized in this review. In order to better meet the needs of modern chemistry, further research outlook was also proposed.

Towards the Understanding of Halogenation in Peptide Hydrogels: a Quantum Chemical Approach

Non-covalent interactions involving aromatic rings play a central role in many areas of modern chemistry. In medicinal and bioorganic chemistry, the intermolecular interactions between the aromatic side chains of amino...