Browsing by Author "Yıldız, Cem Burak"
Now showing items 1-20 of 39
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Assembly of NHC-stabilized 2-hydrophosphasilenes from Si(iv) precursors: a Lewis acid-base complex
Dhara, Debebrata; Mandal, Debdeep; Maiti, Avijit; Yıldız, Cem Burak; Kalita, Pankaj; Chrysochos, Nicolas; Schulzke, Carola; Chandrasekhar, Vadapalli; Jana, Anukul (Royal Society of Chemistry, 2016)NHC-stabilized 2-hydrophosphasilenes are obtained from 1,2-dihydro-2-chlorophosphasilanes as Si(iv) precursors by a NHC-assisted 1,2-elimination of HCl. The NHC-exchange of these compounds is demonstrated as a proof of ... -
Bildung Stabiler All-Silicium Varianten von 1,3-Cyclobutandiyl im Gleichgewicht
Yıldız, Cem Burak; Leszczyñska, Kinga I.; González-Gallardo, Sandra; Zimmer, Michael; Azizoğlu, Akın; Biskup, Till; Kay, Christopher W.M.; Hüch, Volker; Rzepa, Henry S.; Scheschkewitz, David (Wiley-Blackwell, 2020)Hauptgruppenanaloga von 1,3-Cyclobutandiylen faszinieren mit ihrer einzigartigen Reaktivitt und ihren elektronischen Eigenschaften. Bisher sind allerdings nur heteronukleare Vertreter isoliert worden. Wir berichten hier ... -
Carbodicarbenes and striking redox transitions of their conjugate acids: influence of NHC versus CAAC as donor substituents
Dolai, Ramapada; Kumar, Rahul; Elvers, Benedict J.; Pal, Pradeep Kumar; Joseph, Benson; Sikari, Rina; Nayak, Mithilesh Kumar; Yıldız, Cem Burak (John Wiley and Sons Inc, 2023)Herein, a new type of carbodicarbene (CDC) comprising two different classes of carbenes is reported; NHC and CAAC as donor substituents and compare the molecular structure and coordination to Au(I)Cl to those of NHC-only ... -
Computational and experimental study on 7-epicandicandiol isolated from sideritis niveotomentosa huber - Morathii
Yıldız, Cem Burak; Sağır, Züleyha Özer; Kılıç, Turgut; Azizoğlu, Akın (Universitatea Babes-Bolyai, Catedra de Filosofie Sistematica, 2014)7-epicandicandiol is an ent-kaurane diterpenoid isolated from Sideritis niveotomentosa Huber - Morathii. The molecular geometry, vibrational frequencies, and gauge including atomic orbital (GIAO) 1H- and 13C-NMR chemical ... -
Computational investigations on the electronic and structural properties of germacyclopropylidenoids
Yıldız, Cem Burak; Akın, Azizoğlu (2013)DFT (B3LYP) and ab initio (MP2) levels of theories using standard 6-31+G(d,p) basis set have been carried out to investigate the isomeric structures, energies and properties of LiBr-germacyclopropylidenoids. The theoretical ... -
Contrasting reactivity of (boryl)(aryl)lithium-amide with electrophiles: N- vs. p-aryl-C-nucleophilic substitution
Dhara, Debabrata; Vijayakanth, Thangavel; Nayak, Mithilesh Kumar; Kalita, Pankaj; Boomishankar, Ramamoorthy; Yıldız, Cem Burak; Chandrasekhar, Vadapalli; Jana, Anukul (Royal Society of Chemistry, 2018)Herein we report two different reactivity modes of lithium(aryl)(boryl)amide, 4, when it is reacted with chlorosilanes such as SiCl4 and MeSiHCl2, and chlorophosphine, Ph2PCl. Thus, the reaction of lithium(aryl)(boryl)amide, ... -
Cycloaddition reactions of silacyclopropylidenoids to ethylene
Yıldız, Cem Burak; Azizoğlu, Akın (ACG Publications, 2018)The cycloaddition reactions of silacyclopropylidenoids (C2H4SiXLi, X = F, Cl, Br) to ethylene have been investigated separately to gain insights into halogen and solvation effects on the energetic of the proposed reactions ... -
A DFT study on the oxidation of cyclotrisilene by nitrous oxide: the σ- and π-bonds reactivity
Yıldız, Cem Burak (Springer, 2020)The chemistry of heteroatom analogues of cyclopropane derivatives has been receiving considerable interest because of their unexpected reactivities. Herein, the density functional theory (DFT) method was applied to understand ... -
Dimerization of a marginally stable disilenyl germylene to tricyclic systems: evidence for reversible NHC-coordination
Nieder, David; Yıldız, Cem Burak; Jana, Anukul; Zimmer, Michael; Huch, Volker; Scheschkewitz, David (Royal Soc Chemistry, 2016)Tetrasiladigermatricyclohexanes in two isomeric forms (chair and doubly-bridged tetrahedron) are obtained by the reaction of MeLi with an alpha-chlorosilyl functionalized NHC-stabilized silagermenylidene. Si-29 NMR at low ... -
Disclosing Cyclic(Alkyl)(Amino)Carbenes as a One-Electron Reductant: Synthesis of Acyclic(Amino)(Aryl)Carbene-Based Kekulé Diradicaloids
Maiti, Avijit; Elver, Benedict J.; Bera, Sachinath; Lindl, Felix; I-Krummenacher, Ivo; Krummenacher, Ivo; Ghosh, Prasanta; Yıldız, Cem Burak; Braunschweig, Holger; Schulzke, Carola; Jana, Anukul (Wiley, 2022)Herein we disclose cyclic(alkyl)(amino)carbenes (CAACs) as a one-electron reductant under the formation of a transient radical cation as indicated by EPR spectroscopy. Subsequently, the disclosed CAAC reducing reactivity ... -
Diverse reactivity of an electrophilic phosphasilene towards anionic nucleophiles: Substitution or metal-amino exchange
Willmes, Philipp; Junk, Lukas; Huch, Volker; Yıldız, Cem Burak; Scheschkewitz, David (WILEY-V C H Verlag Gmbh, 2016)The reaction of MesLi (Mes=2,4,6-trimethylphenyl) with the electrophilic phosphasilene R-2(NMe2)Si-RSi=PNMe2 (2, R=Tip=2,4,6-triisopropylphenyl) cleanly affords R-2(NMe2)Si-RSi=PMes and thus provides the first example of ... -
Equilibrium Formation of Stable All-Silicon Versions of 1,3-Cyclobutanediyl
Yıldız, Cem Burak; Leszczyñska, Kinga I.; González-Gallardo, Sandra; Zimmer, Michael; Azizoğlu, Akın; Biskup, Till; Kay, Christopher; Hüch, Volker; Rzepa, Henry S.; Scheschkewitz, David (Wiley-VCH Verlag, 2020)Main group analogues of cyclobutane-1,3-diyls are fascinating due to their unique reactivity and electronic properties. So far only heteronuclear examples have been isolated. Here we report the isolation and characterization ... -
Experimental and computational studies on the 1: 1 complex of anthranilic acid with p-toluenesulfonic acid
Şen, İbrahim; Yıldız, Cem Burak; Kara, Hülya; Azizoğlu, Akın (Taylor & Francis, 2013)The proton-transfer compound (3) was synthesized in good yields by the reaction of anthranilic acid with p-toluenesulfonic acid. It was characterized by elemental analysis, infrared spectroscopy, and X-ray single-crystal ... -
Experimental and computational studies on the 1:1 complex of anthranilic acid with p-toluenesulfonic acid
The proton-transfer compound (3) was synthesized in good yields by the reaction of anthranilic acid with p-toluenesulfonic acid. It was characterized by elemental analysis, infrared spectroscopy, and X-ray single-crystal ... -
The halogen effect on the ring-opening of germacyclopropylidenoids to germaallenes
Yıldız, Cem Burak; Azizoğlu, Akın (ACG Publications, 2019)Density functional theory calculations were employed to explore the ring-opening reaction mechanisms of mono germanium analogues of cyclopropylidenoids via Doering-Moore-Skattebøl method. The theoretical findings revealed ... -
A mechanistic investigation on the formation and rearrangement of silaspiropentane: A theoretical study
Yıldız, Cem Burak; Azizoğlu, Akın (Springer Verlag, 2016)The formation of silaspiropentane from addition of singlet silacyclopropylidene 1 and silacyclopropylidenoid 8 to ethylene has been investigated separately at the B3LYP, X3LYP, WB97XD, and M05–2X theories using the 6–31+G(d,p) ... -
A mechanistic study on the reactions of vinyl carbene with hydrogen, carbon monoxide and carbon dioxide: shed light on further manipulations
Yıldız, Cem Burak (Eskişehir Teknik Üniversitesi, 2017)Density Functional calculations have been used to explore the potential energy profiles of H2, CO, and CO2 activation reactionsby vinyl carbene structure 1. The reactions of vinyl carbene 1 with CO2 was proposed to yield ... -
NHC-stabilized 1-hydrosilaimine: Synthesis, structure and reactivity
Dhara, Debabrata; Vijayakanth, Thangavel; Barman, Milan Kr; Naik, Khevath Praveen Kumar; Chrysochos, Nicolas; Yıldız, Cem Burak; Boomishankar, Ramamoorthy; Schulzke, Carola (Royal Society of Chemistry, 2017)A facile, straightforward synthesis of N-heterocyclic carbene (NHC)-stabilized 1-hydrosilaimine starting from a silicon(iv)-precursor is reported. It has been employed for the addition of an O-H bond of water under ambient ... -
Oxidation of hydro-silaimine, phosphasilene, and arsasilene structures (CH3)HSi[dbnd]E(CH3) (E: N, P, or As) via concerted 1,3-dipolar cycloaddition of nitrous oxide: A DFT study
Yıldız, Cem Burak (Elsevier B.V., 2018)Possible concerted 1,3-dipolar cycloaddition reactions of element-hydrogen containing silaimine, phosphasilene, and arsasilene structures (CH3)HSi[dbnd]E(CH3) (denoted as SiE, E = N, P, As) with nitrous oxide (N2O) were ... -
The oxidation state in low-valent beryllium and magnesium compounds
Gimferrer, Marti; Danes, Sergi; Vos, Eva; Yıldız, Cem Burak; Corral, Ines; Jana, Anukul; Salvador, Pedro; Andrada, Diego M. (The Royal Society of Chemistry, 2022)Low-valent group 2 (E = Be and Mg) stabilized compounds have been long synthetically pursued. Here we discuss the electronic structure of a series of Lewis base-stabilized Be and Mg compounds. Despite the accepted zero(0) ...
