The program Mercury, developed by the Cambridge Crystallographic Data Centre, is designed primarily as a crystal structure visualization tool. A new module of functionality has been produced, called the Materials Module, which allows highly customizable searching of structural databases for intermolecular interaction motifs and packing patterns. This new module also includes the ability to perform packing similarity calculations between structures containing the same compound. In addition to the Materials Module, a range of further enhancements to Mercury has been added in this latest release, including void visualization and links to ConQuest, Mogul and IsoStar.

Mercury CSD 2.0 – new features for the visualization and investigation of crystal structures

N-Heterocyclic Carbenes in Late Transition Metal Catalysis

B. Anionic Ligands 302 IX. Group 9 Catalysts 302 X. Group 10 Catalysts 303 A. Neutral Ligands 303 1. R-Diimine and Related Ligands 303 2. Other Neutral Nitrogen-Based Ligands 304 3. Chelating Phosphorus-Based Ligands 304 B. Monoanionic Ligands 305 1. [PO] Chelates 305 2. [NO] Chelates 306 3. Other Monoanionic Ligands 306 4. Carbon-Based Ligands 306 XI. Group 11 Catalysts 307 XII. Group 12 Catalysts 307 XIII. Group 13 Catalysts 307 XIV. Summary and Outlook 308 XV. Glossary 308 XVI. References 308

/pdf/advances-in-non-metallocene-olefin-polymerization-catalysis-abl2neq5j1.pdf

Advances in non-metallocene olefin polymerization catalysis.

This critical review presents a comprehensive study of transition-metal carboxylate clusters which may serve as secondary building units (SBUs) towards construction and synthesis of metal–organic frameworks (MOFs). We describe the geometries of 131 SBUs, their connectivity and composition. This contribution presents a comprehensive list of the wide variety of transition-metal carboxylate clusters which may serve as secondary building units (SBUs) in the construction and synthesis of metal–organic frameworks. The SBUs discussed here were obtained from a search of molecules and extended structures archived in the Cambridge Structure Database (CSD, version 5.28, January 2007) which included only crystals containing metal carboxylate linkages (241 references).

/pdf/secondary-building-units-nets-and-bonding-in-the-chemistry-o0m4ttzsgz.pdf

Secondary building units, nets and bonding in the chemistry of metal–organic frameworks

III. Foldamer Research 3910 A. Overview 3910 B. Motivation 3910 C. Methods 3910 D. General Scope 3912 IV. Peptidomimetic Foldamers 3912 A. The R-Peptide Family 3913 1. Peptoids 3913 2. N,N-Linked Oligoureas 3914 3. Oligopyrrolinones 3915 4. Oxazolidin-2-ones 3916 5. Azatides and Azapeptides 3916 B. The â-Peptide Family 3917 1. â-Peptide Foldamers 3917 2. R-Aminoxy Acids 3937 3. Sulfur-Containing â-Peptide Analogues 3937 4. Hydrazino Peptides 3938 C. The γ-Peptide Family 3938 1. γ-Peptide Foldamers 3938 2. Other Members of the γ-Peptide Family 3941 D. The δ-Peptide Family 3941 1. Alkene-Based δ-Amino Acids 3941 2. Carbopeptoids 3941 V. Single-Stranded Abiotic Foldamers 3944 A. Overview 3944 B. Backbones Utilizing Bipyridine Segments 3944 1. Pyridine−Pyrimidines 3944 2. Pyridine−Pyrimidines with Hydrazal Linkers 3945

A field guide to foldamers.

Synthesis and Structure of a Monomeric Aluminum(I) Compound [{HC(CMeNAr)2}Al] (Ar=2,6–iPr2C6H3): A Stable Aluminum Analogue of a Carbene

Reduction of LAlI2 (1) (L = HC[(CMe)(NAr)]2, Ar = 2,6-i-Pr2C6H3) with potassium in the presence of alkynes C2(SiMe3)2, C2Ph2, and C2Ph(SiMe3) yielded the first neutral cyclopropene analogues of aluminum LAl[η2-C2(SiMe3)2] (3), LAl(η2-C2Ph2) (4), and LAl[η2-C2Ph(SiMe3)] (5), respectively, whereas reduction of 1 in the presence of Ph2CO gave an aluminum pinacolate LAl[O2(CPh2)2] (6), irrespective of the amount of Ph2CO employed. The unsaturated molecules CO2, Ph2CO, and PhCN inserted into one of the Al−C bonds of 3 leading to ring enlargement to give novel aluminum five-membered heterocyclic systems LAl[OC(O)C2(SiMe3)2] (7), LAl[OC(Ph)2C2(SiMe3)2] (8), and LAl[NC(Ph)C2(SiMe3)2] (9) in high yields. In contrast, 3 reacted with t-BuCN, 2,6-Trip2C6H3N3 (Trip = 2,4,6-i-Pr3C6H2), and Ph3SiN3 resulting in the displacement of the alkyne moiety to afford LAl[N2(Ct-Bu)2] (10) with an unprecedented aluminum-containing imidazole ring, and the first monomeric aluminum imides LAlNC6H3-2,6-Trip2 (11) and LAlNSiPh3 (12). A...

Facile Synthesis of Cyclopropene Analogues of Aluminum and an Aluminum Pinacolate, and the Reactivity of LAl[η2-C2(SiMe3)2] toward Unsaturated Molecules (L = HC[(CMe)(NAr)]2, Ar = 2,6-i-Pr2C6H3)

Trimethyltin Fluoride: A New Fluorinating Reagent for the Preparation of Organometallic Fluorides

Durch sterische Blockierung und/oder Einbau in funfgliedrige Ringsysteme stabilisierte Germylene, X2Ge, reagieren mit Azidoverbindungen, YN3, in Abhangigkeit von der Raumerfullung der Substituenten X und Y zu Iminogermanen X2 Ge=NY (1, 2), Azidogermanen, X2Ge(N3)NY2 (6′8), Tetrazagermolen, X2Ge-(–NY–N=)2 (10–16), bzw. Hexaazadigermadispirododecanen, [(NRCH2CH2NR )Ge(μ-NY–)]2 (17, 18). NMR-(1H, 13C, 14N, 15N und 29Si), MS-Daten und Rontgenstrukturanalysen fur die Verbindungen 8, 9, 16 und 18 sind angegeben.



Reactions of Germylenes with Azides: Iminogermanes, Azidogermanes, Tetrazagermoles and Hexaazadigermadispirododecanes



Germylenes, X2Ge, stabilized by steric blocking and/or incorporation into five-membered ring systems, react with azido compounds YN3 depending on the steric requirements of the substituents X and Y to give iminogermanes, X2Ge=NY (1, 2) azidogermanes X2Ge(N3)NY2 (6–8) tetrazagermoles, X2Ge( NY N =)2 (10–16), and hexaazadigermadispirododecanes, [( NR CH2 CH2 NR )Ge(μ-NY –)]2 (17, 18). NMR (1H, 13C, 14N, 15N, and 29Si), MS data, and X-ray structure analyses of the compounds 8, 9, 16, and 18 are reported.

Reaktionen von Germylenen mit Aziden: Iminogermane, Azidogermane, Tetrazagermole und Hexaazadigermadispirododecane

A rationally designed titanium(III) catalyst allows the opening of epoxides with high enantioselectivity. This reaction [Eq. (1)] constitutes the first example of an enantioselective transition metal catalyzed radical reaction that proceeds by electron transfer.

Mathias Noltemeyer

Papers

Synthesis and Structure of a Monomeric Aluminum(I) Compound [{HC(CMeNAr)2}Al] (Ar=2,6–iPr2C6H3): A Stable Aluminum Analogue of a Carbene

Facile Synthesis of Cyclopropene Analogues of Aluminum and an Aluminum Pinacolate, and the Reactivity of LAl[η2-C2(SiMe3)2] toward Unsaturated Molecules (L = HC[(CMe)(NAr)]2, Ar = 2,6-i-Pr2C6H3)

Trimethyltin Fluoride: A New Fluorinating Reagent for the Preparation of Organometallic Fluorides

Reaktionen von Germylenen mit Aziden: Iminogermane, Azidogermane, Tetrazagermole und Hexaazadigermadispirododecane

A Catalytic Enantioselective Electron Transfer Reaction: Titanocene-Catalyzed Enantioselective Formation of Radicals from meso-Epoxides.