Nonconventional driving force for selective oxidative C-C coupling reaction due to concurrent and curious formation of Ag.

Is it possible to 'explore' metal's intrinsic property-a cohesive interaction-which naturally transform M into an aggregate or a particle or film for driving oxidative C-C bond formation? With this intention, reduction of [Ag(NH)] to Ag with concurrent oxidation of different phenols/naphthols to biphenyls was undertaken. The work is originated during careful observation of an undergraduate experiment-Tollens' test-where silver mirror film deposition takes place on the walls of borosilicate glass test tube. When the same reaction was carried out in polypropylene (plastic-Eppendorf) tube, we observed aggregation of Ag leading to floating Ag-particles but not silver film deposition.

Water-Assisted Self-Aggregation of Benzimidazole and Triazole Adducts.

The manuscript revolves around an interesting observation of solidification of a solution of -((1-((1-ethyl-1-benzo[]imidazol-2-yl)methyl)-1-1,2,3-triazole-4-yl)methyl)aniline ( in the NMR tube after around 12 h. Real-time images showed fibrillar and spherulitic growth with tip branching and side branching, which is thermoreversible. The compound under investigation is unique because it is synthesized to understand the anticancer activity with two pharmacophores, benzimidazole and triazole.

Back-Bonding Signature with High Pressure: Raman Studies on Silver Nitroprusside.

In centrosymmetric molecules, like A[M(CN)] (where A is alkali metal cation), normally all stretching vibrations of cyanide (CN) shift to high frequency in response to nonhydrostatic pressure, whereas, in non-centrosymmetric molecules in which one axial CN ligand is replaced by NO ligand, one observes unusual softening of only equatorial CN stretching modes. This effect is pronounced when A is replaced by Ag with difference in coordination ability of latter, resulting in expression of characteristic signature of back-bonding. One can correlate this uneven stretching of cyanide to Poisson-like effect, where the axial Fe-N, Fe-C, and C-N stretching modes harden but the equatorial C-N stretching modes soften due to expansion at the equatorial plane.

Accommodative Behavior of Non-porous Molecular crystal at Solid-Gas and Solid-Liquid Interface.

Molecular crystals demonstrate drastically different behavior in solid and liquid state, mainly due to their difference in structural frameworks. Therefore, designing of unique structured molecular compound which can work at both these interfaces has been a challenge. Here, we present remarkable 'molecular' property by non-porous molecular solid crystal, dinuclear copper complex (C6H5CH(X)NH2)2CuCl2, to reversibly 'adsorb' HCl gas at solid-gas interface as well as 'accommodate' azide anion at solid-liquid interface with crystal to crystal transformation.

Single crystal X-Ray structure of BeF2: α-quartz.

We report for the first time, the synthesis and X-ray diffraction studies of single crystals of BeF(2). The crystals were obtained during the sublimation of amorphous BeF(2) under static reduced pressure. BeF(2) crystallizes in the chiral trigonal space group P3(1)21.

Studies on TMPD:TCNB; a donor-acceptor with room temperature paramagnetism and n-pi interaction.

A donor-acceptor compound based on N,N,N',N'-tetramethyl-p-phenylene-diamine and 1,2,4,5-tetracyanobenzene (TMPD:TCNB) has been synthesized. The crystal structure of the black 1:1 complex formed between TMPD and TCNB has been determined by single crystal X-ray diffraction at room temperature. The compound crystallizes in the triclinic space group P-1 with cell dimensions: a = 7.

A Three-Dimensional Ferrimagnet with a High Magnetic Transition Temperature (T ) of 53 K Based on a Chiral Molecule.

The transparent, double bridged-(R)-spiral three-dimensional polymeric complex K [Cr(CN) ][Mn(S)-pn](S)-pnH ((S)-pn=(S)-1,2-diaminopropane) has been synthesized and characterized (see X-ray structure; Cr: brown, Mn: red, C: gray, N: blue, K: green). Magnetic measurements on the complex show that the Mn and Cr ions interact ferrimagnetically and magnetic transition occurs at 53 K (Curie temperature).