Boron atoms from Nd:YAG laser ablation of the solid have been codeposited with Ar/O2 samples on a 11±1 K salt window. The product infrared spectrum was dominated by three strong 11B isotopic bands at 1299.3, 1282.8, and 1274.6 cm−1 10B counterparts 1347.6, 1330.7, 1322.2 cm−1. Oxygen substitution (16O18O 18O2 ) confirms assignment these to ν3 linear BO2. Renner–Teller coupling is evident in ν2 bending motion. A sharp medium intensity band 1854.7 has appropriate ratios for BO, which exhibits...

The CUO molecule, formed from the reaction of laser-ablated U atoms with CO in a noble gas, exhibits very different stretching frequencies solid argon matrix [804.3 and 852.5 wave numbers (cm −1 )] than neon (872.2 1047.3 cm ). Related experiments consisting 1% suggest that are interacting directly molecule. Relativistic density functional calculations predict can bind to one atom (U-Ar = 3.16 angstroms; binding energy 3.2 kilocalories per mole), accompanied by change ground state singlet...

A new generation of simple methylidene complexes has been prepared by reactions excited group 4−6 transition metal atoms with methyl halides and methane in solid argon. These CH2MHX (X = F, Cl, Br, I) CH2MH2 exhibit agostic bonding effects CH2 MH2 distortion. The proceed through the CH3MX insertion product followed α-H transfer on an potential energy surface. higher valence 6 metals sustains a second to form CH⋮MH2X (M Mo, W, X H, Br) methylidyne complexes, electron capture 5 Nb, Ta, gives...

Lithium superoxide has been synthesized by reacting lithium atoms and oxygen molecules at high dilution in inert matrices. Isotopic substitution all atomic positions use of isotopic mixtures verify the molecular identity indicate an isosceles triangular structure. Eighteen frequencies from six determine potential constants FO–O = 5.59 ± 0.05, FLi–O 1.18 0.02, FLi–O,Li–O − 0.21 0.03 mdyn / Å. The oxygen–oxygen force constant for LiO2 coincides with that calculated O2−, which suggests molecule...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTArgon matrix Raman and infrared spectra vibrational analysis of ozone the oxygen-18 substituted moleculesLester Andrews Robert C. Spiker Jr.Cite this: J. Phys. Chem. 1972, 76, 22, 3208–3213Publication Date (Print):October 1, 1972Publication History Published online1 May 2002Published inissue 1 October 1972https://pubs.acs.org/doi/10.1021/j100666a018https://doi.org/10.1021/j100666a018research-articleACS PublicationsRequest reuse permissionsArticle...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman and ultraviolet absorption spectra of the triiodide ion produced by alkali iodide-iodine argon matrix reactionsLester Andrews, Eleanor S. Prochaska, Aharon LoewenschussCite this: Inorg. Chem. 1980, 19, 2, 463–465Publication Date (Print):February 1, 1980Publication History Published online1 May 2002Published inissue 1 February 1980https://pubs.acs.org/doi/10.1021/ic50204a036https://doi.org/10.1021/ic50204a036research-articleACS...

The primary products of the reaction lithium atoms and carbon tetrachloride in solid argon at 15°K are chloride trichloromethyl radical, which identified by infrared spectral studies. Natural chlorine isotopes, 13 bromine substitution, loss CCl3 absorptions with attendant growth due to C2Cl6 on sample warming verify molecular identity. Assignments carbon–chlorine stretching vibrations ν1 = 674 ν3 898 cm−1 supported normal coordinate calculations, weak bending modes ν2 ν4 were not detected....

Deposition of atomic beams potassium and rubidium with oxygen molecules at high dilution in argon together on a salt window 15°K produces the KO2 RbO2 molecules, as identified by infrared spectra. Secondary reaction yields KO2K RbO2Rb molecules. Oxygen isotopic mixtures simultaneous deposition two different alkali-metal atoms verify molecular composition. Detailed concentration changes isotropic identify new species O2KO2 O2RbO2, rubdium disuperoxide which likely have D2d structure. Force...

Molecules that contain boron-boron multiple bonds are extremely rare due to the electron-deficient nature of boron. Here we report experimental and theoretical evidence a neutral OCBBCO molecule with some triple bond character. The was produced unambiguously characterized by matrix isolation infrared spectroscopy. Quantum chemical calculations indicate has linear singlet ground state very short length.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Pulsed-Laser Evaporated Boron Atoms with Hydrogen. Infrared Spectra Hydride Intermediate Species in Solid ArgonThomas J. Tague Jr. and Lester AndrewsCite this: Am. Chem. Soc. 1994, 116, 11, 4970–4976Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://pubs.acs.org/doi/10.1021/ja00090a048https://doi.org/10.1021/ja00090a048research-articleACS PublicationsRequest reuse...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Laser Ablated Titanium, Zirconium, and Hafnium Atoms with Oxygen Molecules in Condensing ArgonGeorge V. Chertihin Lester AndrewsCite this: J. Phys. Chem. 1995, 99, 17, 6356–6366Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April 1995https://pubs.acs.org/doi/10.1021/j100017a015https://doi.org/10.1021/j100017a015research-articleACS PublicationsRequest reuse permissionsArticle...

Reaction of laser-ablated Fe atoms with oxygen molecules in a condensing argon stream produced FeO, FeO2, FeO3, FeO4, Fe2O, Fe2O2, and Fe2O4 molecules, which are identified from isotopic shifts multiplets matrix infrared spectra. The + O2 reaction gives symmetrical bent, cyclic, asymmetrical bent FeO2 isomeric products triplet, quartet absorptions, respectively, using statistically mixed 16,18O2 as the reagent. major product OFeO iron dioxide molecule (150 ± 10°) is characterized by...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNoble Gas Complexes with BeO: Infrared Spectra of NG-BeO (NG = Ar, Kr, Xe)Craig A. Thompson and Lester AndrewsCite this: J. Am. Chem. Soc. 1994, 116, 1, 423–424Publication Date (Print):January 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://doi.org/10.1021/ja00080a069Request reuse permissionsArticle Views347Altmetric-Citations139LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text...

Although many volatile binary boron hydride compounds are known, aluminum chemistry is limited to the polymeric (AlH3)(n) solid. The reaction of laser-ablated atoms and pure H2 during codeposition at 3.5 kelvin, followed by ultraviolet irradiation annealing 6.5 allows dimerization intermediate AlH3 photolysis product form Al2H6. Al2H6 molecule identified seven new infrared absorptions that accurately predicted quantum chemical calculations for dibridged Al2H6, a isostructural with diborane.

A new take on quicksilver: The elements of Group 12 are generally considered post-transition metals with filled d shells. However, calculations predict d8 HgF4 (see plot the electron localization function) to be stable. IR spectroscopy in solid neon and argon matrixes gives first experimental evidence for HgF4. As HgIV, mercury would a true transition metal that fully utilizes its 5d orbitals bonding. Supporting information this article is available WWW under...

Laser-ablated U atoms react with CO in excess argon to produce CUO, which is trapped a triplet state solid at 7 K, based on agreement between observed and relativistic density functional theory (DFT) calculated isotopic frequencies (12C16O, 13C16O, 12C18O). This observation contrasts recent neon matrix investigation, CUO linear singlet be about 1 kcal/mol lower energy. Experiments krypton xenon give results analogous those argon. Similar work dilute Kr Xe finds small frequency shifts new...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNear-infrared absorption spectra of fullerene (C60) radical cations and anions prepared simultaneously in solid argonZbigniew Gasyna, Lester Andrews, Paul N. SchatzCite this: J. Phys. Chem. 1992, 96, 4, 1525–1527Publication Date (Print):February 1, 1992Publication History Published online1 May 2002Published inissue 1 February 1992https://pubs.acs.org/doi/10.1021/j100183a005https://doi.org/10.1021/j100183a005research-articleACS PublicationsRequest...

Matrix reactions of H and D atoms from a microwave discharge source with oxygen molecules diluted in argon have produced significantly higher yields HO2 DO2 than the previous photolysis methods. Oxygen isotopic enrichment confirmed vibrational assignments to HO2; greater concentrations allowed observation weak 0–0 mode at 1123 cm−1. Normal coordinate calculations using frequencies gave excellent agreement observed data. The bonding is suggested be largely covalent, contrast ionic species Li+O2−.

The mechanism for trapping new chemical species by condensing the products of a microwave discharge with inert matrices has been investigated. Variation geometrical, electrical, and parameters Ar, HCl, Cl2 system indicated that major product species—HCl2 radical or anion—was formed under conditions where neither ions nor atomic produced in were condensed matrix. forming is vacuum ultraviolet photolysis sample during deposition radiation from discharge, since coaxial orifice tube provided...

Laser-ablation experiments with metals provide a source of electrons for capture processes, which are codeposited solid argon and neon containing molecular fluorine. New matrix absorptions at 510.6 524.7 cm(-1), respectively, photosensitive upon irradiation >290 nm, is consistent their assignment to an isolated anion. These bands below the [M](+)[F(3)](-) antisymmetric trifluoride stretching frequency 550 cm(-1) in matrix, typical relationship cation-anion complexes matrix-isolated anions....