Article
Chemistry, Inorganic & Nuclear
Rhys P. King, Julie M. Herniman, William Levason, Gillian Reid
Summary: A series of M(II) (M = Ge, Sn, Pb) complexes with endocyclic thioether macrocyclic coordination and varying coordination numbers have been synthesized. The ligand is bound in an endocyclic manner, and the coordination environment and number are dependent on the group 14 ion, macrocyclic ring size, and number of S-donor atoms. The stability of the metal-macrocycle coordination in solution and the dissociation of triflate anions were investigated.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kelling J. Donald, Supreeth Prasad, Kaitlin Wilson
Summary: The study computationally examined the structural and energetic properties of model halogen bonded complexes under different dielectric conditions using an implicit solvent model. Ge was found to outperform Si in mediating inductive effects, and linear relationships were identified. Additionally, a trend was observed where F3M-I-NH3 became less stable as the optimized I-N distance shortened in various dielectric environments.
Review
Chemistry, Multidisciplinary
Ying Kai Loh, Simon Aldridge
Summary: Main group carbonyl analogues derived from p-block elements have long been considered elusive. The recent isolation of acid-base free main group carbonyl analogues marked a new era, offering exciting new chemistry opportunities with their unperturbed nature. The emerging reactivity profiles of these derivatives highlight potential crossover reactivity with carbon and transition metal oxo species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Philipp Sikora, Robert Naumann, Christoph Foerster, Katja Heinze
Summary: Despite the great progress achieved on phosphorescent or photoactive complexes of Earth-abundant transition metals, examples for phosphorescent heavy main group element complexes are rare, especially for group 14 complexes in the oxidation state +II. This study on tin(II) and lead(II) complexes provides unprecedented insight in the excited state energy landscape of tetrel(II) complexes and offers rational design principles for tetrel(II) complexes with long-lived phosphorescence.
Article
Chemistry, Multidisciplinary
Xiangjin Kong, Pan-Pan Zhou, Yao Wang
Summary: This study introduces the concept of chalcogen...pi bonding catalysis, which activates molecules of pi systems through interaction between chalcogen and pi-electron cloud. The experimental results demonstrate that S...pi and Se...pi bonding interaction can efficiently drive the cycloaddition reaction, with double Se...pi bonding interaction influencing the stereoselectivity of the process.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Qingyu Zhang, Yung-Yin Chan, Muyin Zhang, Ying-Yeung Yeung, Zhihai Ke
Summary: This study presents a proof-of-concept for hypervalent chalcogenonium center dot center dot center dot pi bonding catalysis. A new catalytic strategy using 1,2-oxaselenolium salts as chalcogen bond donors and alkenes as chalcogen bond acceptors is described. The results demonstrate the feasibility of this concept and highlight the significant effect of counter anions on catalysis based on hypervalent chalcogenonium center dot center dot center dot pi bonding interactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Inorganic & Nuclear
Qingyang Fan, Haichao Peng, Wei Zhang, Xinhai Yu, Sining Yun
Summary: J-germanium was found to be stable under ambient pressure and exhibit a larger anisotropy, making it a potential candidate material for photovoltaic devices.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Dong Liu, Song Xu, Gerui Pei, Jianzhi Xu, Xintian Zhao, Chuncai Kong, Zhimao Yang, Tao Yang
Summary: The geometries, electronic structures, and bonding properties of endohedral Zintl clusters with various cage structures have been investigated using ab initio calculations. The results show that the cage symmetry affects the bonding interactions and energy contributions.
JOURNAL OF COMPUTATIONAL CHEMISTRY
(2022)
Article
Chemistry, Organic
Nobuhiro Fumoto, Yohei Haketa, Hiroki Tanaka, Nobuhiro Yasuda, Hiromitsu Maeda
Summary: DPPhs yield various hydrogen-bonding-stabilized pi-electronic anions upon deprotonation, and pi-electronic cations are introduced through ion-pair metathesis to form tightly bound pi-electronic ion pairs in solution, resulting in solid-state charge-by-charge assemblies with assembling modes modulated according to the geometries and electronic states of the positively charged constituents and substituents of the DPPh anions.
Article
Chemistry, Physical
Yunfeng Zhang, Xiaojun Li, Jun Lu, Shuna Li, Yunguang Zhang
Summary: The structure, chemical stability, electronic property, spherical aromaticity, and bonding of neutral Au@X12 (X = Ge, Sn, Pb) clusters and their anions were systematically investigated using density-functional theory (DFT) calculations. It was found that Au@Ge12 displayed bicapped pentagonal prism geometry, while Au@X12 (X = Sn, Pb) exhibited perfect icosahedral geometry. The high chemical stabilities of these clusters were attributed to spherical aromaticity and delocalized chemical bonding.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Qi Shen, Jiashi Xu, Xiaodan Chen
Summary: This study provides a detailed investigation on the properties of phosphaphthalimide (1) and discovers the presence of pi-delocalization between 1 and neighboring carbonyl groups. Sodium salts of 1 were successfully synthesized using a modified procedure, and it was found that 1 exhibits good electrophilicity with the essential role of pi-delocalization in controlling its ambident properties.
DALTON TRANSACTIONS
(2022)
Article
Biochemistry & Molecular Biology
Erin D. Speetzen, Chideraa I. Nwachukwu, Nathan P. Bowling, Eric Bosch
Summary: This study expands on previous research and combines the concepts of ditopic halogen bonding and π-stacking in cocrystallization. The experiments demonstrate the complementary interaction between electron donor-acceptor pairs through halogen bonding and π-complexation, with computations confirming the strength of π-stacking over halogen bonding and the cooperative effect between the two.
Article
Chemistry, Physical
Zhong-hua Cui, Yu-qian Liu, Meng-hui Wang
Summary: The study found unexpectedly linear group 13 E equivalent to E triple bonds in the D-4h-symmetry E2Li62+ clusters, which are stabilized by the multi-center sigma bond and the electrostatic interactions from surrounding Li-6 motifs.
Article
Engineering, Multidisciplinary
Lei Zeng, Xuqing Liu, Xiaogang Chen, Constantinos Soutis
Summary: This study introduces a new biomimetic method for modifying carbon fiber surfaces to enhance bonding with epoxy resin systems. By forming a nano-thin surface-adherent polydopamine layer and grafting graphene oxide, the interfacial strength of the composites was increased significantly. The research demonstrated the potential of pi-pi interaction-based fiber modification in improving the crack resistance of fiber reinforced polymer composites.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Raphael Robidas, Claude Y. Y. Legault
Summary: Halogen bond donors have made significant contributions to catalysis in recent years, and their development is highly active. Particularly, numerous iodine-based halogen bond donors have been developed and used for promoting various reactions through coordinating carbonyl groups, which are a common activation mode in catalysis. Computational data now suggests the possibility of an alternative activation mode, through direct pi-complexation, for unsaturated carbonyl substrates. Additionally, solvent polarity is found to have a significant impact on the preferred mode of activation, implying the potential for a mechanistic switch through solvent variation. These findings could have a profound impact on the development of the next generation of halogen bond donor catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Juan J. Moreno, Alejandra Pita-Milleiro, Ana Luque-Gomez, Maria F. Espada, Joaquin Lopez-Serrano, Jesus Campos
Summary: The combination of Lewis acidic Ir(III) cation and Lewis basic Pt(0) compound offers potential for bond activation and catalysis. The study uncovers a cooperative cleavage reaction of dihydrogen and provides evidence for a synergistic route rather than a genuine FLP-type activation. The whole process involves equilibrium processes and the Bronsted catalyzed hydrogenation.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2023)
Article
Chemistry, Physical
Patricia Rodriguez-Salamanca, Gonzalo de Gonzalo, Jose A. Carmona, Joaquin Lopez-Serrano, Javier Iglesias-Siguenza, Rosario Fernandez, Jose M. Lassaletta, Valentin Hornillos
Summary: This article describes a highly enantioselective biocatalytic dynamic kinetic resolution (DKR) for configurationally labile N-arylindole aldehydes. The DKR is achieved through atroposelective bioreduction of the carbonyl group using commercial ketoreductases (KREDs), resulting in axially chiral N-arylindole aminoalcohols with excellent conversions and optical purities. The strategy relies on the racemization of the stereogenic axis facilitated by a transient Lewis pair interaction between NMe2 and the aldehyde groups. This protocol offers a broad substrate scope under mild conditions.
Article
Chemistry, Inorganic & Nuclear
Alejandra Pita-Milleiro, Macarena G. Alferez, Juan J. Moreno, Maria F. Espada, Celia Maya, Jesus Campos
Summary: The divergent reactivity of a cationic iridium complex toward organolithium and Grignard reagents is discussed. The Cp* ligand exhibits unexpected electrophilic behavior towards organolithium reagents and can also undergo facile deprotonation in the presence of less nucleophilic organolithium reagents. Weaker alkylating agents effectively achieve alkylation of the metal center, and the reactive iridium(III) alkyls participate in subsequent reactions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Miquel Navarro, Markus Holzapfel, Jesus Campos
Summary: A cavity-shaped gold(I) complex derived from a bulky tri-(ortho-biaryl)-phosphine ligand exhibits preferred selectivity towards terminal functionalities in the gold(I)-catalysed hydration of alkynes under mild heating, thanks to a well-defined pocket as the catalytic active site. This selectivity differs from other gold(I) complexes with bulky phosphine ligands, which show reduced selectivity or similar behavior towards both internal and terminal alkynes. We also explore the potential of gold(III) derivatives for the same catalytic process.
Review
Chemistry, Multidisciplinary
Marina Perez-Jimenez, Helena Corona, Felipe de la Cruz-Martinez, Jesus Campos
Summary: In this review, we discuss the strategy of donor-acceptor interactions for capturing and activating carbon dioxide. We categorize the systems into metal-free examples, main group-transition metal combinations, and transition metal heterobimetallic complexes, and summarize one hundred compounds with cooperative CO2 activation by donor-acceptor interactions. This perspective provides an overview of the wide variety of structural motifs and assesses the limitations and prospects for developing catalytic protocols for CO2 functionalization.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Miquel Navarro, Markus Holzapfel, Jesuïs Campos
Summary: We have examined the use of a cavity-shaped phosphine to facilitate the insertion of CO2 into Au-OH and Au-NH bonds. This approach allows access to various unusual species, including monomeric gold(I) carbonate, carbamate, urea, or hydride complexes. We have also discovered a cavity-shaped linear gold(I) hydroxide complex that serves as a platform for accessing unique gold monomeric species. This study contributes to the understanding of the reactivity and versatility of gold compounds.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Marina Perez-Jimenez, Jesus Campos
Summary: Starting with the first σ-H2 complex reported by Kubas in 1984, the bonding between σ-E-H bonds of main group elements and transition metals has become a fundamental topic in organometallic chemistry. Although organometallic reagents with metal-carbon bonds are commonly used, the description of transition metal σ-E-C complexes (E = main group metal) is lacking. This perspective work aims to question the possibility of defining such complexes that revolve around M-C-E motifs.
Article
Chemistry, Physical
Andrea Monti, Joaquin Lopez-Serrano, Auxiliadora Prieto, M. Carmen Nicasio
Summary: In this study, a Pd-based catalyst was developed for the amination of aryl sulfamates. The Pd complex efficiently catalyzes the C-N coupling of aryl sulfamates with various nitrogen nucleophiles through an oxidative addition step, showing a broad scope of substrates.
Article
Chemistry, Multidisciplinary
Marta Fernandez-Buenestado, Rosie J. Somerville, Joaquin Lopez-Serrano, Jesus Campos
Summary: We present a novel iridium system with a long-tethered PGeP ligand, which allows access to the less common germylene form, never reported before for an 'NHC-type' Ge ligand. Computational studies confirm its bonding, and we demonstrate its application in the catalytic dehydrogenation of formic acid, showcasing the potential of this underdeveloped ligand type.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Macarena G. Alferez, Juan J. Moreno, Celia Maya, Jesus Campos
Summary: This study provides a systematic investigation on the cooperative interaction between Lewis basic Rh(i) compounds and highly congested Lewis acidic Au(i) species. The non-innocent role of the (C5Me5)(-) ligand and the direct implication of the gold fragment in unusual bimetallic ligand activation event are demonstrated. The formation of dinuclear Lewis adducts and the selective control of reactivity by modifying ligand properties are also investigated.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Maria M. Alcaide, Matteo Pugliesi, Eleuterio Alvarez, Joaquin Lopez-Serrano, Riccardo Peloso
Summary: Two highly sterically demanding phosphonite ligands were synthesized and their structural features and steric descriptors were examined using DFT methods. The ligands were found to have a high tendency for C-H activation and could generate various coordination complexes.
Article
Chemistry, Inorganic & Nuclear
Maria M. Alcaide, Praxedes Sanchez, Eleuterio Alvarez, Celia Maya, Joaquin Lopez-Serrano, Riccardo Peloso
Summary: In this study, Pt(ii) alkylidene 1a was reacted with terminal alkynes to form ylide complexes 3a-d through electrophilic activation and insertion. DFT calculations demonstrated that the observed regioselectivity is determined by the nucleophilic attack of the alkyne to the alkylidene carbon.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Nina Podjed, Barbara Modec, Rodolphe Clerac, Mathieu Rouzieres, Maria M. Alcaide, Joaquin Lopez-Serrano
Summary: The reactions between [Cu(quin)(2)(H2O)] and a series of aliphatic amino alcohols resulted in structurally diverse copper(II) complexes with different ligands and coordination modes.
NEW JOURNAL OF CHEMISTRY
(2022)
