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Hochlaf M, Linguerri R, Dalal SS, Francisco JS. Theoretical study of the spectroscopically relevant parameters for the detection of HNPq and HPNq (q = 0, +1, −1) in the gas phase. J Chem Phys 2012; 136:244311. [DOI: 10.1063/1.4730299] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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52
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Halfen DT, Sun M, Clouthier DJ, Ziurys LM. The microwave and millimeter rotational spectra of the PCN radical (X̃3Σ−). J Chem Phys 2012; 136:144312. [PMID: 22502523 DOI: 10.1063/1.3696893] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- D T Halfen
- Department of Chemistry, Arizona Radio Observatory and Steward Observatory, University of Arizona, Tucson AZ 85721, USA
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53
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Cimas Á, Rayón VM, Largo A. Computational study of the reaction of P+ with acetylene: does spin-crossing play a significant role? J Phys Chem A 2012; 116:3014-22. [PMID: 22352296 DOI: 10.1021/jp2123604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A computational study of the reaction of P(+)((3)P) with acetylene has been carried out. The only exothermic products correlating with the reactants are PCCH(+)((2)Π) + H((2)S). Two different pathways leading to these products that are apparently barrier-free have been found. Both pathways involve isomerization into open-chain intermediates followed by direct elimination of a hydrogen atom. The possibility of spin-crossing has been considered because the species on the singlet surface are considerably more stable than those on the triplet one. On the singlet surface, there are other possible channels for the reaction, namely, cyclic PC(2)H(+)((2)A') + H((2)S) and CCP(+)((1)Σ) + H(2) ((1)Σ(g)(+)). A computational kinetic study shows that, in agreement with the experimental evidence, the major products are PCCH(+)((2)Π) + H((2)S) at all temperatures. Only at very high temperatures is CCP(+)((1)Σ) + H(2) ((1)Σ(g)(+)) formed in non-negligible amounts. Therefore, only PCCH(+) should be formed in the interstellar medium.
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Affiliation(s)
- Álvaro Cimas
- Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal.
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54
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Toulouze M, Pilmé J, Pauzat F, Ellinger Y. Arsenic in prebiotic species: a theoretical approach. Phys Chem Chem Phys 2012; 14:10515-22. [DOI: 10.1039/c2cp41042g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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55
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WANG SUYUN, YAMAGUCHI YUKIO, SCHAEFER HENRYF. THE EXOTHERMIC PNC → PCN REACTION. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633606002234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
PCN and PNC are possible interstellar species that have not been experimentally characterized. With various ab initio methods, including multireference and restricted open-shell single-reference electronic structure theory, the PCN/PNC species and the transition state for the isomerization reaction PCN ↔ PNC have been studied. The Dunning series of correlation-consistent basis sets, cc-pVXZ and aug-cc-pVXZ (X = T and Q), have been used. Geometries, total energies, dipole moments, harmonic vibrational frequencies, infrared intensities, and zero-point vibrational energies are reported for the PCN/PNC isomers and the transition state. Both PCN and PNC are linear with 3Σ- ground states, and linear [Formula: see text] is predicted to lie 13.7 kcal mol-1 (13.5 kcal mol-1 with ZPVE correction) above linear [Formula: see text] at the aug-cc-pVQZ CCSD(T) level of theory. The CN bond distance in [Formula: see text] is predicted to be 1.174 Å, only 0.002 Å longer than the experimental value of 1.172 Å for diatomic CN (X2Σ+, suggesting that CN has triple bond character in [Formula: see text]. The isomerization transition state is found to be cyclic [Formula: see text], with angles θ e ( PCN ) = 82.2°, θ e ( CNP ) = 63.1°, and θ e ( NPC ) = 34.7°. The isomerization barrier is predicted to be 35.7 kcal mol-1 (34.5 kcal mol-1 with ZPVE correction) relative to linear [Formula: see text]. The predicted dipole moments are substantial, 2.79 debye (polarity + PCN -) and 2.51 debye (polarity + PNC -).
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Affiliation(s)
- SUYUN WANG
- Center for Computational Chemistry, University of Georgia, Athens, GA 30602-2556, USA
| | - YUKIO YAMAGUCHI
- Center for Computational Chemistry, University of Georgia, Athens, GA 30602-2556, USA
| | - HENRY F. SCHAEFER
- Center for Computational Chemistry, University of Georgia, Athens, GA 30602-2556, USA
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56
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Al-Rafia SMI, Ferguson MJ, Rivard E. Interaction of Carbene and Olefin Donors with [Cl2PN]3: Exploration of a Reductive Pathway toward (PN)3. Inorg Chem 2011; 50:10543-5. [DOI: 10.1021/ic201812a] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. M. Ibrahim Al-Rafia
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Michael J. Ferguson
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Eric Rivard
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
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57
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Halfen DT, Clouthier DJ, Ziurys LM, Lattanzi V, McCarthy MC, Thaddeus P, Thorwirth S. The pure rotational spectrum of HPS (X̃1A′): Chemical bonding in second-row elements. J Chem Phys 2011; 134:134302. [PMID: 21476750 DOI: 10.1063/1.3562374] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- D T Halfen
- Department of Chemistry, Arizona Radio Observatory, and Steward Observatory University of Arizona, Tucson, Arizona 85721, USA
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58
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By J. R. FLORES and P. REDONDO. A theoretical study of the dynamics of the reaction of P+ with ammonia. Mol Phys 2010. [DOI: 10.1080/002689797170022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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59
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Varadwaj PR. Hydrogen bonding interactions in PN···HX complexes: DFT and ab initio studies of structure, properties and topology. J Mol Model 2009; 16:965-74. [DOI: 10.1007/s00894-009-0603-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Accepted: 09/29/2009] [Indexed: 10/20/2022]
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62
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63
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Maclean MJ, Eichinger PCH, Wang T, Fitzgerald M, Bowie JH. A theoretical study of the cyclization processes of energized CCCSi and CCCP. J Phys Chem A 2008; 112:12714-20. [PMID: 19007196 DOI: 10.1021/jp807403s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Calculations at the CCSD(T)/aug-cc-pVDZ//B3LYP/6-31+G(d) level of theory have shown that cyclization of both the ground state triplet and the corresponding singlet state of CCCSi may rearrange to give cyclic isomers which upon ring opening may reform linear C(3)Si isomers in which the carbon atoms are scrambled. The cyclization processes are energetically favorable with barriers to the transition states from 13 to 16 kcal mol(-1). This should be contrasted with the analogous process of triplet CCCC to triplet rhombic C(4), which requires an excess energy of 25.8 kcal mol(-1). A similar cyclization of doublet CCCP requires 50.4 kcal mol(-1) of excess energy; this should be contrasted with the same process for CCCN, which requires 54.7 kcal mol(-1) to effect cyclization.
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Affiliation(s)
- Micheal J Maclean
- Department of Chemistry, The University of Adelaide, South Australia 5005
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64
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Hammami K, Nkem C, Owono Owono LC, Jaidane N, Ben Lakhdar Z. Rotationally inelastic collisions of methinoposphide (HCP) with para-H2 at low temperature. J Chem Phys 2008; 129:204305. [DOI: 10.1063/1.3009268] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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65
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Lattelais M, Pauzat F, Pilmé J, Ellinger Y. Electronic structure of simple phosphorus containing molecules [C,xH,O,P] candidate for astrobiology (x=1, 3, 5). Phys Chem Chem Phys 2008; 10:2089-97. [PMID: 18688363 DOI: 10.1039/b714919k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- M Lattelais
- UMPC Université Paris 06, UMR-CNRS 7616, Laboratoire de Chimie Théorique, F75005, Paris, France
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66
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Guo Y, Gu X, Zhang F, Sun BJ, Tsai MF, Chang AHH, Kaiser RI. Unraveling the formation of HCPH(X2A') molecules in extraterrestrial environments: crossed molecular beam study of the reaction of carbon atoms, C(3Pj), with phosphine, PH3(X1A1). J Phys Chem A 2007; 111:3241-7. [PMID: 17428038 DOI: 10.1021/jp066729x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The reaction between ground state carbon atoms, C(3P(j)), and phosphine, PH3(X(1)A1), was investigated at two collision energies of 21.1 and 42.5 kJ mol(-1) using the crossed molecular beam technique. The chemical dynamics extracted from the time-of-flight spectra and laboratory angular distributions combined with ab initio calculations propose that the reaction proceeds on the triplet surface via an addition of atomic carbon to the phosphorus atom. This leads to a triplet CPH3 complex. A successive hydrogen shift forms an HCPH2 intermediate. The latter was found to decompose through atomic hydrogen emission leading to the cis/trans-HCPH(X(2)A') reaction products. The identification of cis/trans-HCPH(X(2)A') molecules under single collision conditions presents a potential pathway to form the very first carbon-phosphorus bond in extraterrestrial environments like molecular clouds and circumstellar envelopes, and even in the postplume chemistry of the collision of comet Shoemaker-Levy 9 with Jupiter.
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Affiliation(s)
- Y Guo
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA
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67
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Gorrell IB, Wang L, Marks AJ, Bryant DE, Bouillot F, Goddard A, Heard DE, Kee TP. On the origin of the Murchison meteorite phosphonates. Implications for pre-biotic chemistry. Chem Commun (Camb) 2006:1643-5. [PMID: 16583006 DOI: 10.1039/b517497j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ab initio calculations, combined with experimental studies on the anaerobic hydrolysis of phosphaalkynes under thermal and photochemical conditions suggest a potential, exogenous source of reduced oxidation state phosphorus for the early Earth.
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Affiliation(s)
- Ian B Gorrell
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, UK LS2 9JT
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68
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Cazzoli G, Cludi L, Puzzarini C. Microwave spectrum of P14N and P15N: Spectroscopic constants and molecular structure. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2005.07.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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69
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Dissociative recombination study of at CRYRING: absolute cross-section, chemical branching ratios and three-body fragmentation dynamics. Mol Phys 2005. [DOI: 10.1080/00268970500185674] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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70
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Abstract
Quantum chemical calculations are used to explore the proton-transfer reactivity of O-protonated vinyl alcohol, CH2CHOH2+, with phosphorus nitride, PN. This reaction is relevant to the chemical evolution of interstellar clouds, since O-protonated vinyl alcohol has been postulated (and tentatively identified) as a product of the association reaction between interstellar H3O+ and C2H2, while PN is the most widespread and abundant phosphorus-containing molecule seen in astrophysical environments. Furthermore, the reaction exhibits an unusual mechanistic feature, namely, an extended "proton-transport catalysis" mechanism, which we characterize here as a "proton-transfer triple play". The reaction proceeds initially by proton transfer from CH2CHOH2+ to PN, then from PNH+ to CH2CHOH, and finally from CH3CHOH+ to PN, where the emphasized atom indicates the resultant site of protonation/deprotonation. Thus, the ultimate overall bimolecular proton-transfer reaction is expected to occur as CH2CHOH2+ + PN --> CH3CHO + PNH+; that is, the apparent favored product channel exhibits not only proton transfer but also keto/enol tautomerization. The triple-play mechanism can be rationalized in terms of the proton affinities of vinyl alcohol, acetaldehyde, and phosphorus nitride, which here are satisfactorily reproduced by high-level ab initio calculations. Other neutrals with a proton affinity appropriate for the possible triple-play mechanism converting CH2CHOH2+ to CH3CHO are also identified, with a view to encouraging experimental investigation of this mechanism.
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Affiliation(s)
- Simon Petrie
- Department of Chemistry, the Faculties, Australian National University, Canberra ACT 0200, Australia.
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71
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Abstract
In this tutorial review we consider the role of phosphorus and its compounds within the context of chemical evolution in galaxies. Following an interdisciplinary approach we first discuss the position of P among the main biogenic elements by considering its relevance in most essential biochemical functions as well as its peculiar chemistry under different physicochemical conditions. Then we review the phosphorus distribution in different cosmic sites, such as terrestrial planets, interplanetary dust particles, cometary dust, planetary atmospheres and the interstellar medium (ISM). In this way we realize that this element is both scarce and ubiquitous in the universe. These features can be related to the complex nucleosynthesis of P nuclide in the cores of massive stars under explosive conditions favouring a wide distribution of this element through the ISM, where it would be ready to react with other available atoms. A general tendency towards more oxidized phosphorus compounds is clearly appreciated as chemical evolution proceeds from circumstellar and ISM materials to protoplanetary and planetary condensed matter phases. To conclude we discuss some possible routes allowing for the incorporation of phosphorus compounds of prebiotic interest during the earlier stages of solar system formation.
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Affiliation(s)
- Enrique Maciá
- Departamento de Física de Materiales, Facultad CC. Físicas, Universidad Complutense de Madrid, E-28040, Madrid, Spain.
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72
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Yu GT, Ding YH, Huang XR, Sun CC. Theoretical Study on Structures and Stability of C4P Isomers. J Phys Chem A 2005; 109:1594-602. [PMID: 16833482 DOI: 10.1021/jp045393t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structures, energetics, spectroscopies, and stabilities of doublet C(4)P isomeric species are explored at the DFT/B3LYP, QCISD, and CCSD(T) (singlet-point) levels. A total of 12 minimum isomers and 27 interconversion transition states are located. At the CCSD(T)/6-311G(2df)//QCISD/6-311G(d)+ZPVE level, the lowest-lying isomer is a floppy CCCCP 1 (0.0 kcal/mol) mainly featuring a cumulenic structure |C=C=C=C=P*|, which differs much from the analogous C4N radical (|*C-C[triple bond]C-C[triple bond]N|). The quasi-linearity and the low bending mode of 1 are in contrast to the previous prediction. The second energetically followed isomer PC-cCCC 3 (14.9 kcal/mol) possesses a CCC ring-bonded to CP. The two low-lying isomers are separated by a high-energy ring-closure/open transition state (26.5 kcal/mol) and thus are very promising candidates for future laboratory and astrophysical detection. Furthermore, four high-energy isomers, that is, two bent isomers CCPCC 2 (68.4 kcal/mol) and CCPCC 2' (68.5 kcal/mol) and two cagelike species 10 (56.0 kcal/mol) and 11 (67.9 kcal/mol), are also stabilized by considerable barriers. The present work is the first detailed potential energy survey of CnP clusters and can provide useful information for the investigation of larger CnP radicals and for understanding the isomerism of P-doped C vaporization processes.
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Affiliation(s)
- Guang-Tao Yu
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
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73
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Tackett BS, Clouthier DJ, Adam AG, Shepard SA. Phosphorus hyperfine structure in the electronic spectrum of the HPCl free radical. J Chem Phys 2004; 121:1405-11. [PMID: 15260685 DOI: 10.1063/1.1758698] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The 444 nm 2 0 (1) bands of the A 2A'-X 2A" transition of the jet-cooled HP 35Cl and HP 37Cl radicals have been studied at high resolution using the pulsed electric discharge technique with a precursor mixture of PCl3 and H2. Spectra recorded with linewidths of approximately 360 MHz revealed resolved hyperfine structure in both isotopomers arising from the excited state Fermi contact interaction of the unpaired electron with the magnetic moment of the 31P nucleus, with aF'=0.0641(10) cm(-1) and 0.0636(31) cm(-1) for HP 35Cl and HP 37Cl, respectively. No contribution from the ground state, or excited state contributions from the hydrogen or chlorine nuclei were resolved, confirming ab initio predictions that HPCl is a p pi radical in the X state, and an s sigma radical with a substantial contribution from the phosphorus 3s atomic orbital in the A state. The free atom comparison method has been used to estimate that the singly occupied molecular orbital in the excited state has 14% phosphorus 3s character.
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Affiliation(s)
- Brandon S Tackett
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
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74
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dos Santos LG, Ornellas FR. Excited doublet and quartet states of SiP: a high level theoretical investigation. Chem Phys 2003. [DOI: 10.1016/j.chemphys.2003.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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75
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Ozeki H, Habara H, Ahmad IK, Saito S, Yamamoto S. Fourier transform microwave spectroscopy of the CH2CP(X̃ 2B1) radical. J Chem Phys 2002. [DOI: 10.1063/1.1502641] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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76
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Kwon O, Almond PM, McKee ML. Structures and Reactions of P2N2: A Hybrid of Elemental N2 and P4? J Phys Chem A 2002. [DOI: 10.1021/jp020716b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ohyun Kwon
- Department of Chemistry, Auburn University, Auburn, Alabama 36849
| | - Philip M. Almond
- Department of Chemistry, Auburn University, Auburn, Alabama 36849
| | - Michael L. McKee
- Department of Chemistry, Auburn University, Auburn, Alabama 36849
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77
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Jakubek ZJ, Nakhate SG, Simard B. The SiP molecule: The first observation and spectroscopic characterization. J Chem Phys 2002. [DOI: 10.1063/1.1462582] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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78
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Affiliation(s)
- Ohyun Kwon
- Department of Chemistry, Auburn University, Auburn, Alabama 36849
| | - Michael L. McKee
- Department of Chemistry, Auburn University, Auburn, Alabama 36849
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79
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Macia E, Hernandez MV, Oro J. Primary sources of phosphorus and phosphates in chemical evolution. ORIGINS LIFE EVOL B 1997; 27:459-80. [PMID: 11536836 DOI: 10.1023/a:1006523226472] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In this work we consider the role of phosphorus in chemical evolution from an interdisciplinary approach. First we briefly review the presence of this element in different cosmic sites, such as massive stellar cores, circumstellar and interstellar clouds, meteorites, lunar and Martian samples, interplanetary dust particles, cometary dust and planetary atmospheres. Thus we illustrate the fact that phosphorus seems to be, at the same time, scarce and ubiquitous in the solar system. Afterwards, by comparing the phosphorus content of our planet's main reservoirs with the amount of cometary and meteoritic matter captured by the primitive Earth, we conclude that comets may have provided a primary source for phosphorus compounds of prebiotic interest. Finally, we make a number of proposals aimed to gain observational supporting evidence to the above conclusion and other suggestions made in the article.
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Affiliation(s)
- E Macia
- Departamento de Fisica de Materiales, Universidad Complutense de Madrid, Spain
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80
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El-Yazal J, Martin JML, François JP. Structure and Vibrations of the C2P and CNP Radicals and Their Cations Using Density Functional and Coupled Cluster Theories. J Phys Chem A 1997. [DOI: 10.1021/jp970614z] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jamal El-Yazal
- Department SBG, Institute for Materials Sciences (IMO), Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium, and Department of Chemistry, Institute for Materials Sciences, University of Antwerp (UIA), Universiteitplein 1, B-2610 Wilrijk, Belgium
| | - Jan M. L. Martin
- Department SBG, Institute for Materials Sciences (IMO), Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium, and Department of Chemistry, Institute for Materials Sciences, University of Antwerp (UIA), Universiteitplein 1, B-2610 Wilrijk, Belgium
| | - Jean-Pierre François
- Department SBG, Institute for Materials Sciences (IMO), Limburgs Universitair Centrum, Universitaire Campus, B-3590 Diepenbeek, Belgium, and Department of Chemistry, Institute for Materials Sciences, University of Antwerp (UIA), Universiteitplein 1, B-2610 Wilrijk, Belgium
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81
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Van Huis TJ, Yamaguchi Y, Sherrill CD, Schaefer HF. X̃ 1A1, ã 3B1, Ã 1B1, and B̃ 1A1 Electronic States of. J Phys Chem A 1997. [DOI: 10.1021/jp970980i] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Timothy J. Van Huis
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
| | - Yukio Yamaguchi
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
| | - C. David Sherrill
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
| | - Henry F. Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602
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82
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Filippi A, Occhiucci G, Speranza M. Theoretical and Experimental Study of the Gas-Phase Reactions of PFn+ (n = 1, 2) Ions with n-Bases. A Novel Route to Phosphorus Ions Present in Interstellar Clouds. Inorg Chem 1997. [DOI: 10.1021/ic961394r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antonello Filippi
- Facoltà di Farmacia, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, 00185 Rome, Italy, and Istituto di Chimica Nucleare e Servizio FTMS del CNR, Area della Ricerca del CNR, 00016 Monterotondo Stazione, Rome, Italy
| | - Giorgio Occhiucci
- Facoltà di Farmacia, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, 00185 Rome, Italy, and Istituto di Chimica Nucleare e Servizio FTMS del CNR, Area della Ricerca del CNR, 00016 Monterotondo Stazione, Rome, Italy
| | - Maurizio Speranza
- Facoltà di Farmacia, Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università di Roma “La Sapienza”, 00185 Rome, Italy, and Istituto di Chimica Nucleare e Servizio FTMS del CNR, Area della Ricerca del CNR, 00016 Monterotondo Stazione, Rome, Italy
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83
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Ahmad IK, Ozeki H, Saito S. Microwave spectroscopic detection of HCCP in the X 3Σ− electronic state: Phospho-carbene, phospho-allene, or phosphorene? J Chem Phys 1997. [DOI: 10.1063/1.474488] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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84
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Cruz EM, Fowler JE, Lopez X, Ugalde JM. Reaction of P+(3P) with Methylamine: A Detailed Study of the Potential Energy Surface and Reaction Mechanisms. J Phys Chem A 1997. [DOI: 10.1021/jp970396+] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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85
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Cruz EM, Lopez X, Sarobe M, Coss�o FP, Ugalde JM. G2 study of triplet [H4, Si, P]+ potential energy surface: Mechanism for reaction of P+ (3P) with silane. J Comput Chem 1997. [DOI: 10.1002/(sici)1096-987x(19970115)18:1<9::aid-jcc2>3.0.co;2-u] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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86
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Schilke P, Groesbeck TD, Blake GA, Phillips TG. A line survey of Orion KL from 325 to 360 GHz. THE ASTROPHYSICAL JOURNAL. SUPPLEMENT SERIES 1997; 108:301-337. [PMID: 11539874 DOI: 10.1086/312948] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We present a high-sensitivity spectral line survey of the high-mass star-forming region Orion KL in the 325-360 GHz frequency band. The survey was conducted at the Caltech Submillimeter Observatory on Mauna Kea, Hawaii. The sensitivity achieved is typically 0.1-0.5 K and is limited mostly by the sideband separation method utilized. We find 717 resolvable features consisting of 1004 lines, among which 60 are unidentified. The identified lines are due to 34 species and various isotopomers. Most of the unidentified lines are weak, and many of them most likely due to isotopomers or vibrationally or torsionally excited states of known species with unknown line frequencies, but a few reach the 2-5 K level. No new species have been identified, but we were able to strengthen evidence for the identification of ethanol in Orion and found the first nitrogen sulfide line in this source. The molecule dominating the integrated line emission is S02, which emits twice the intensity of CO, followed by SO, which is only slightly stronger than CO. In contrast, the largest number of lines is emitted from heavy organic rotors like HCOOCH3, CH3CH2CN, and CH3OCH3, but their contribution to the total flux is unimportant. CH3OH is also very prominent, both in the number of lines and in integrated flux. An interesting detail of this survey is the first detection of vibrationally excited HCN in the v2 = 2 state, 2000 K above ground. Clearly this is a glimpse into the very inner part of the Orion hot core.
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Affiliation(s)
- P Schilke
- Department of Physics, California Institute of Technology, Pasadena 91125, USA.
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87
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del Río E, Barrientos C, Largo A. Theoretical Studies of Possible Processes for the Interstellar Production of Phosphorus Compounds: The Reaction of P+ with C3H2. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960301o] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emma del Río
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006 Oviedo, Spain
| | - Carmen Barrientos
- Departamento de Química Física, Facultad de Ciencias, Universidad de Valladolid, 47005 Valladolid, Spain
| | - Antonio Largo
- Departamento de Química Física, Facultad de Ciencias, Universidad de Valladolid, 47005 Valladolid, Spain
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88
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Thermochemistry of the reactions of PH+2 (1A1) and PH+2 (3B1) with CO. A G2 molecular orbital study. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)00438-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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89
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Esseffar M, Luna A, Mó O, Yáñez M. High-level ab initio calculations on the structures and relative stabilities of [O, P, H] systems and their cations. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)80132-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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90
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Petrmichl RH, Peterson KA, Woods RC. The microwave spectrum of PO+: Comparison to SiF+. J Chem Phys 1991. [DOI: 10.1063/1.459771] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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91
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92
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Smith D, McIntosh BJ, Adams NG. A selected ion flow tube study of the reactions of the PH+n ions (n=0 to 4) with several molecular gases at 300 K. J Chem Phys 1989. [DOI: 10.1063/1.456337] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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93
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Oró J, Mills T. Chemical evolution of primitive solar system bodies. ADVANCES IN SPACE RESEARCH : THE OFFICIAL JOURNAL OF THE COMMITTEE ON SPACE RESEARCH (COSPAR) 1989; 9:105-120. [PMID: 11537358 DOI: 10.1016/0273-1177(89)90372-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In this paper we summarize some of the most salient observations made recently on the organic molecules and other compounds of the biogenic elements present in the interstellar medium and in the primitive bodies of the solar system. They include the discovery of the first phosphorus molecular species in dense interstellar clouds, the presence of complex organic ions in the dust and gas phase of Halley's coma, the finding of unusual, probably presolar, deuterium-hydrogen ratios in the amino acids of carbonaceous chondrites, and new developments on the chemical evolution of Titan, the primitive Earth, and early Mars. Some of the outstanding problems concerning the synthesis of organic molecules on different cosmic bodies are also discussed from an exobiological perspective.
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Affiliation(s)
- J Oró
- Department of Biochemical and Biophysical Sciences, The University of Houston, TX 77004
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94
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Irvine WM. Observational astrochemistry: recent results. ADVANCES IN SPACE RESEARCH : THE OFFICIAL JOURNAL OF THE COMMITTEE ON SPACE RESEARCH (COSPAR) 1989; 9:3-12. [PMID: 11537359 DOI: 10.1016/0273-1177(89)90357-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
More than 80 molecular species have now been observed by astronomers in the dense interstellar clouds where stars and planets form or in the envelopes expelled by evolved stars. Elemental constituents of these compounds include all of the "biogenic" elements, hydrogen, carbon, nitrogen, oxygen, sulfur, and (most recently) phosphorus. In addition, silicon is found in several molecules, and a series of metal halides have recently been detected in the outflowing envelope of a nearby carbon star. Additions to the list of known interstellar molecules since the last COSPAR meeting are discussed individually. Recent measurements of the hydrogen isotopic fractionation for the cyclic molecule C3H2 are described; values up to 10,000 times the cosmic deuterium-to-hydrogen ratio are found. Knowledge of the chemical reservoirs for the major volatile elements and a comparison between observed molecular abundances and theoretical models are both discussed.
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Affiliation(s)
- W M Irvine
- Five College Radio Astronomy Observatory, University of Massachusetts, Amherst 01003, USA
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95
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Molecular Cloud Chemistry. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/978-94-009-3019-3_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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96
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