Lutz Greb
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View article: Aryl‐ and Silyl‐Substituted Silyliumylidene Ions in the Hydrosilylation of CO <sub>2</sub>
Aryl‐ and Silyl‐Substituted Silyliumylidene Ions in the Hydrosilylation of CO <sub>2</sub> Open
Tetryliumylidene ions, stabilized by N ‐heterocyclic carbenes (NHCs), have emerged as promising main‐group catalysts for the reduction of carbon dioxide (CO 2 ). Herein, we report the catalytic activity of aryl‐ and silyl‐substituted silyl…
View article: Inverting Palladium–Phosphorus Lewis Pair Formation: Phosphonium Acting as Z‐Type Ligand
Inverting Palladium–Phosphorus Lewis Pair Formation: Phosphonium Acting as Z‐Type Ligand Open
Phosphorus‐based ligands are prototypical L‐type donors. Here, we introduce a Lewis acidic phosphonium cation that engages in unprecedented Z‐type coordination to palladium(0). The resulting Pd→P(V) interactions are structurally unique and…
View article: Invertierte Palladium‐Phosphor Lewis‐Paar Bildung: Phosphonium als Z‐Typ Ligand
Invertierte Palladium‐Phosphor Lewis‐Paar Bildung: Phosphonium als Z‐Typ Ligand Open
Kurzzusammenfassung Phosphorbasierte Liganden sind klassische L‐Typ‐Donatoren. Hier stellen wir ein Lewis‐azides Phosphoniumkation vor, dass eine beispiellose Z‐Typ‐Koordination mit Palladium(0) eingeht. Die daraus resultierenden Pd→P(V)‐W…
View article: What distinguishes the strength and the effect of a Lewis base: insights with a strong chromogenic silicon Lewis acid
What distinguishes the strength and the effect of a Lewis base: insights with a strong chromogenic silicon Lewis acid Open
A chromogenic Si( iv )-Lewis acid allows rationalizing the difference between the thermodynamic strength and the effect of Lewis bases.
View article: Pd(0)/Pd(II) Electromerism Triggered by Lewis Base Coordination to a Redox‐Active Silicon Z‐Type Ligand
Pd(0)/Pd(II) Electromerism Triggered by Lewis Base Coordination to a Redox‐Active Silicon Z‐Type Ligand Open
Electromerism (aka. valence tautomerism) corresponds to the switching of electronic distributions between redox‐active ligands and central elements. While this phenomenon is well established for several transition metals, the Pd(0)/Pd(II) …
View article: Amplifying Lewis acidity by oxidation: leveraging the redox-activity of bis(3,6-di- <i>tert</i> -butyl-catecholato)silane
Amplifying Lewis acidity by oxidation: leveraging the redox-activity of bis(3,6-di- <i>tert</i> -butyl-catecholato)silane Open
Oxidation boosts the potential of bis(catecholato)silanes, transforming them into Lewis superacidic radical cations with remarkable catalytic activity in dimerization, hydrodeoxygenation, and carbonyl-olefin metathesis.
View article: Critical Evaluation of Childs Method for the NMR Spectroscopic Scaling of Effective Lewis Acidity: Limitations and Resolution of Earlier Discrepancies
Critical Evaluation of Childs Method for the NMR Spectroscopic Scaling of Effective Lewis Acidity: Limitations and Resolution of Earlier Discrepancies Open
Quantifying Lewis acidity is essential for understanding and optimizing the performance of Lewis acids in diverse applications. Next to the widely accepted Gutmann‐Beckett (GB) method, using triethyl phosphine oxide (TEPO) as a probe, the …
View article: Structural constraint at a P–P bond: phosphinophosphination of alkenes, alkynes, and carbonyls by a concerted mechanism
Structural constraint at a P–P bond: phosphinophosphination of alkenes, alkynes, and carbonyls by a concerted mechanism Open
A structural constraint approach at a P–P bond is presented that enables the phosphinophosphination of alkynes, alkenes, and carbonyls with high regio- and diastereoselectivity. The apolar nature of the P–P bond facilitates a concerted mec…
View article: Dynamic Coordination Behavior of a Structurally Constrained, Nucleophilic Sn(II) Towards Gold(I)
Dynamic Coordination Behavior of a Structurally Constrained, Nucleophilic Sn(II) Towards Gold(I) Open
Tetradentate meso ‐octaalkylcalix[4]pyrroles are well‐established ligands in d ‐ and f ‐block chemistry. In contrast to the related porphyrins, the sp 3 ‐hybridized meso ‐carbon atoms linking the four pyrrole units result in highly divers …
View article: Structural Flexibility is a Decisive Factor in FLP Dihydrogen Cleavage with Tetrahedral Lewis Acids: A Silane Case Study
Structural Flexibility is a Decisive Factor in FLP Dihydrogen Cleavage with Tetrahedral Lewis Acids: A Silane Case Study Open
Dihydrogen activation is the paradigmatic reaction of frustrated Lewis pairs (FLPs). While trigonal‐planar Lewis acids have been well established in this transformation, tetrahedral Lewis acids are surprisingly limited. Indeed, several cas…
View article: Conformational and Substitution Effects on the Donor and Reducing Strength of Tin(II) Porphyrinogens
Conformational and Substitution Effects on the Donor and Reducing Strength of Tin(II) Porphyrinogens Open
Meso ‐octaalkylcalix[4]pyrrolates are a class of redox‐active porphyrinogen ligands. They have been well established in d ‐ and f ‐block chemistry for over three decades but have only recently been introduced as ligands for p ‐block elemen…
View article: Concatenating Structural Constraint Effects at Tin for the Sequential Generation, Stabilization, and Transfer of Acyclic Aminocarbenes
Concatenating Structural Constraint Effects at Tin for the Sequential Generation, Stabilization, and Transfer of Acyclic Aminocarbenes Open
Structural constraint approaches have been employed toward different ends in recent years, from augmenting the nucleophilicity in pyramidalized low-valent p-block compounds to enhancing the Lewis acidities at planarized tetravalent p-block…
View article: Predicting Lewis Acidity: Machine Learning the Fluoride Ion Affinity of <i>p</i>‐Block‐Atom‐Based Molecules
Predicting Lewis Acidity: Machine Learning the Fluoride Ion Affinity of <i>p</i>‐Block‐Atom‐Based Molecules Open
“How strong is this Lewis acid?” is a question researchers often approach by calculating its fluoride ion affinity (FIA) with quantum chemistry. Here, we present FIA49k, an extensive FIA dataset with 48,986 data points calculated at the RI…
View article: Predicting Lewis Acidity: Machine Learning the Fluoride Ion Affinity of <i>p</i>‐Block‐Atom‐Based Molecules
Predicting Lewis Acidity: Machine Learning the Fluoride Ion Affinity of <i>p</i>‐Block‐Atom‐Based Molecules Open
“How strong is this Lewis acid?” is a question researchers often approach by calculating its fluoride ion affinity (FIA) with quantum chemistry. Here, we present FIA49k, an extensive FIA dataset with 48,986 data points calculated at the RI…
View article: Silicon‐Catalyzed Depolymerization of Polyethers: Pushing Scope, Practicability and Mechanistic Understanding
Silicon‐Catalyzed Depolymerization of Polyethers: Pushing Scope, Practicability and Mechanistic Understanding Open
The depolymerization of polyethers is a sustainable yet challenging opportunity for a circular economy in materials processing. While we recently identified silicon Lewis superacids as promising catalysts for this transformation, limited s…
View article: Nitrogen monoxide and calix[4]pyrrolato aluminate: structural constraint enabled NO dimerization
Nitrogen monoxide and calix[4]pyrrolato aluminate: structural constraint enabled NO dimerization Open
The dimerization of nitrogen monoxide (NO) is highly relevant in biochemical and environmental redox processes. Here, it is shown how structral constraint and element-ligand cooperativity can steer this reaction.
View article: CCDC 2294990: Experimental Crystal Structure Determination
CCDC 2294990: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294992: Experimental Crystal Structure Determination
CCDC 2294992: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294994: Experimental Crystal Structure Determination
CCDC 2294994: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294991: Experimental Crystal Structure Determination
CCDC 2294991: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294993: Experimental Crystal Structure Determination
CCDC 2294993: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Metal‐Free B−B Dehydrocoupling Reaction of a Simple Borane Adduct: Convenient Access to a Nucleophilic Diborane(4)
Metal‐Free B−B Dehydrocoupling Reaction of a Simple Borane Adduct: Convenient Access to a Nucleophilic Diborane(4) Open
The selective formation of homonuclear bonds is of key importance in synthetic chemistry. Especially, dehydrocoupling reactions are attractive as ecologically and economically friendly alternatives to established reductive bond forming rea…
View article: CCDC 2294420: Experimental Crystal Structure Determination
CCDC 2294420: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294419: Experimental Crystal Structure Determination
CCDC 2294419: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294418: Experimental Crystal Structure Determination
CCDC 2294418: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2303185: Experimental Crystal Structure Determination
CCDC 2303185: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294416: Experimental Crystal Structure Determination
CCDC 2294416: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294415: Experimental Crystal Structure Determination
CCDC 2294415: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2294417: Experimental Crystal Structure Determination
CCDC 2294417: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …