The reaction of germanium(<sc>i</sc>) pyridyl-1-azaallyl dimer [(RGe)₂] (<bold>2</bold>) [R = {N(SiMe₃)C(Ph)C(SiMe₃)(C₅H₄N-2)}] with an excess elemental sulfur afforded unprecedented germanium analogue a dithiocarboxylic acid anhydride [{Ge(S)R}₂S] (<bold>4</bold>). X-ray structures <bold>2</bold> and <bold>4</bold> have been determined.

The promotion of spatial skills is essential in chemistry education. However, the process acquiring these can be monotonous if learning limited to memorization Newman projections or 3D molecular kits. Existing approaches using visualizing tools require physical models which limit activities within classroom. Augmented reality (AR) education allows students see actual compound representation a environment, inspect compounds from multiple viewpoints, and control interaction real-time any...

The reaction of [{N(SiMe3)C(Ph)C(SiMe3)(C5H4N-2)}GeCl] (1) with Na[M(η5-C5H5)(CO)3]·2DME (M = Mo, W) afforded the metallogermylenes [{N(SiMe3)C(Ph)C(SiMe3)(C5H4N-2)}Ge-M(η5-C5H5)(CO)3] Mo (2), W (3)). Compounds 2 and 3 have been characterized by X-ray crystallography NMR IR spectroscopy. Structural analyses compounds are consistent presence lone-pair electrons at germanium(II) center. Ge–Mo Ge–W bond distances 2.875(1) 2.852(1) Å Ge–metal single bonds. chlorogermylene 1 was also used in...

Reactivity of the pyridyl-1-azaallyl germanium(I) dimer LGeGeL (2; L = N(SiMe3)C(Ph)C(SiMe3)(C5H4N-2)) has been investigated. Treatment 2 with 1 equiv azobenzene afforded digermahydrazine derivative [LGeNPh]2 (3). The reaction and diiron nonacarbonyl, Fe2(CO)9, novel unsymmetric complex [LGeGe(Fe(CO)4)L] (4) Lewis acid–base adduct [LGe(Fe(CO)4)]2 (5). solid-state structure 4 reveals that two centers within same molecule have different coordinating geometries. Compound can also be prepared by...

The onset of the COVID-19 pandemic has caused disruptions to traditional face-to-face classroom teaching. In this communication, practice adopted in online teaching three chemistry subjects a local community college, student and feedback, as well case comparison giving responses classes through chatting platform will be discussed. Reflections from current experience literature findings implications for use PowerPoint, response systems, Teams, Whiteboard toward an enhanced also described.

Environmental sustainability is important to public health and of particular significance considering the rapidly growing ageing population. While advancement in chemical science has contributed enhanced quality life, increasing levels pollutions impact chemicals on human environment have led serious concern. The deterioration environmental been largely due pollution elderly group are being more susceptible hazardous effects industrial airborne pollutants. It also presented uphill challenges...

Metalation of the (iminophosphoranyl)phosphine PPh2CH2(PPh2═NSiMe3) (1) with an equimolar amount n-BuLi afforded monolithium salt [Li{CH(PPh2)(PPh2═NSiMe3)}(THF)2] (2). The reaction 2 GeCl2·1,4-dioxane has led to formation a germavinylene moiety, which trimerized form new heterocyclic cage compound, [{(PPh2═NSiMe3)(PPh2)C═Ge:}{(PPh2═NSiMe3)(PPh2)C}2Ge→Ge:] (3). A similar lithium methanide complex SnCl2 stannavinylidene underwent "head-to-tail" cycloaddition stable 1,3-distannacyclobutane, 4....

The second release of Thermodynamic Database for Nucleic Acids, NTDB 2.0, includes more than 4600 entries (250% increase over 1.0). It contains sequence types and details several thermodynamic parameters (enthalpy, Δ H ; entropy, S Gibbs free energy, G melting temperature, T m ), experimental models methods extracting parameters, buffer conditions as well all relevant literature information. In addition, the database statistics references related to are included. Information on normal...

A new thermodynamic database for normal and modified nucleic acids has been developed. This Thermodynamic Database Nucleic Acids (NTDB) includes sequence, structure information as well experimental methods conditions. In this release, there are 1851 sequences containing both acids. user-friendly web-based interface developed to allow data searching under different Useful tools the study of have collected linked easy usage. NTDB is available at http://ntdb.chem.cuhk.edu.hk.