Annika Schmidt

Access to Garden of the Gods Park is open from both the north and the south after an improvements project turned the corridor into a more functional wildfire evacuation route

An El Paso County sheriff's deputy was arrested Thursday on suspicion of menacing and first-degree official misconduct, according to a news release from the Sheriff's Office.

A Colorado Springs resident who became “Jeopardy!” champion Tuesday night had a short stint in the winner’s seat after earning second place on Wednesday.

Swimmers, splashers and sun-tanners have a lot to look forward to this weekend: Splash pads, fountains and public pools are reopening Memorial Day weekend as the weather warms up.

As the weather warms and Colorado Springs residents flock to outdoor pools this weekend, the YMCA of the Pikes Peak Region is equipped with enough lifeguards for full operations this

Check out some local events happening in the Colorado Springs area this Memorial Day weekend:

Described herein is the successful crystallization-induced dynamic resolution (CIDR) of an α-lithiated phosphine borane utilizing the easily accessible and inexpensive ligand (R,R)-TMCDA. Starting from the essential P-prochiral building block dimethyl phenyl phosphine borane we were able to obtain phosphine boranes in yields up to 80% and e.r. up to 98:2 by crystallization of the lithiated intermediate prior to the trapping reaction. NMR-based deuterium labeling experiments indicate that the epimerization in solution is based on the intermolecular proton transfer between nonlithiated phosphine borane and the corresponding lithiated intermediate, rendering the presence of the remaining starting compound in an optimized solvent mixture the main factor for successful enantioselective synthesis. Quantum chemical calculations using different model systems based on solid state structures confirm these experimental results. By gaining insights into the epimerization mechanism, essential principles for CIDR of lithiated phosphine boranes are elucidated that may be expanded to other important P-stereogenic compounds and simple chiral amines.

Abstract Activities like ball bouncing and trampoline jumping showcase the human ability to intuitively tune to system dynamics and excite motions that the system prefers intrinsically.

The olefinic dithioether (Z)-1,4-bis(pyridin-2-ylthio)but-2-ene Z-PyS(CH2CH=CHCH2)SPy (L) was prepared by the treatment of cis-ClCH2CH=CHCH2Cl with in situ generated potassium pyridine-2-thiolate Py-SK and analyzed by IR and NMR spectroscopy. To investigate the chemistry of polynuclear iodobismuthate complexes, two equivalents of BiI3 were reacted with L in the MeOH solution to afford the anionic tetranuclear title compound (C14H15S2N2)2(C9H10SN)2[Bi4I116] with a N-protonated (Z)-1,4-bis(pyridin-2-ylthio)but-2-ene as a counterion. Compound 1 was characterized by IR and UV spectroscopy; the formation of a tetranuclear framework was ascertained by a single-crystal X-ray diffraction study performed at 100 K. Furthermore, an unusual Bi(III)-meditated cyclization of one Z-PyS(CH2CH=CHCH2)SPy ligand occurred, affording the bicyclic pyridinium salt 3-vinyl-2,3-dihydrothiazolo[3,2-a]pyridinium bearing a terminal vinyl group, compensating the second negative charge of the Bi4I164− cluster anion. The SCXRD characterization was completed by a Hirshfeld surface analysis, revealing some secondary interactions occurring in the crystal.

Annika Schmidt/MEDILL Global warming: Past, present & future It was Hall's second day in the field at the southern tip of Chile in early March.