摘要:

Data from electronic Raman spectroscopy are employed to calculate temperature dependent magnetic susceptibilities for terbium aluminum garnet, terbium gallium garnet, europium gallium garnet, thulium aluminum garnet, and thulium gallium garnet. An electronic Raman spectrum of terbium gallium garnet is reported, as are newly observed electronic levels in thulium gallium garnet.

ISSN:0008-4042    

DOI:10.1139/v74-510

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

The photolysis of SO2at 3130 Å and 25 °C in the presence of C2H2leads to CO, and, in the presence of allene to CO and C2H4as gas phase products. In the C2H2system, the CO comes from the two non-emitting triplet states of SO2, 57% from SO2** and 43% from SO2≠. In the allene system, the two excited singlet states of SO2, and possibly the emitting triplet state, also participate. The relative importance of the contributions from each state can be estimated to be >35% from1SO2, <16% from3SO2, 8% from SO2*, 12% from SO2**, and 29% from SO2≠.

ISSN:0008-4042    

DOI:10.1139/v74-511

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

Dithiomalonamide (Hdtma) andN,N′-diphenyldithiomalonamide (Hdpma) form diamagnetic square-planar complexes PdL2and PdL2•2DMF. For these complexes a [PdS4] coordination was suggested by their electronic and i.r. spectra. The splitting orbital parameters, Δ1, indicates that these anionic ligands assume an intermediate position in the spectrochemical series of sulfur donors. These ligands also form Pd(HL)2X2(X = Cl, Br, I, ClO4) and PdHLX2(X = Cl, Br, I) complexes in which spectroscopic evidence suggests an S,N bidentate ligand coordination, forming six-membered rings. ν(PdN) and ν(PdS) are tentatively assigned. For Pd(Hdpma)2X2complexes from the far i.r. and electronic spectra we propose acis-PdN2S2configuration. The Δ1parameters in the six-membered ring Pd(HL)2X2complexes indicate a ligand strength greater than in the analogous S,N coordinated five-membered ring complexes of dithiooxamides and show an inversion of the order found in Ni(HL)2X2(HL = Hdtma, Hdpma) complexes. In PdHLX2complexes the presence of two bands assignable to Vasym(PdX) and Vsym(PdX) supports acis-halogen configuration.

ISSN:0008-4042    

DOI:10.1139/v74-512

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

The solubility of indium trichloride in water has been determined in the range 25 to 110 °C. The ternary systems: indium chloride – sodium chloride–water; indium chloride–calcium chloride–water, and indium chloride–dioxane–water, have been investigated at 25 &([a-z]+);C. Three double salts have been found to occur, having the formulas: 6(InCl3•3H2O)•5(CaCl2•4H2O); InCl3•3C4H8O2•2H2O, and InCl3•2C4H8O2•2H2O.

ISSN:0008-4042    

DOI:10.1139/v74-513

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

The electric dipole polarizability tensor of the hydrogen molecule-ion has been calculated variationally over a wide range of internuclear separations, using the accurate two center James (ref. 3) orbital as the unperturbed wavefunction. Our most accurate values, obtained with first order functions containing between three and five variational parameters, are in good agreement with some recent moment function values calculated by Bates (ref. 7).

ISSN:0008-4042    

DOI:10.1139/v74-514

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

not available

ISSN:0008-4042    

DOI:10.1139/v74-515

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

We report the preparation of rhodium(III) complexes of 2,3,2 tet; 3,2,3 tet, 3,3,3 tet, and 3,4,3 tet. In the case of the [Rh(2,3,2 tet)Cl2]Cl complex, both thecis-&([a-z]+); andtransforms were isolated. In the remaining cases, only thetransform was isolated.

ISSN:0008-4042    

DOI:10.1139/v74-516

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

The products obtained from the 1,3 cycloadditions of a variety of silyldiazoalkanes, R3SiCN2R′, to several alkenes were studied: the data are consistent with the initial formation of the expected Δ1-pyrazoline. However, when R′ = Ph, COOEt, but not Me, a thermal 1,3 rearrangement of the silyl group from carbon to nitrogen subsequently occurs. Base-catalyzed isomerizations of the Δ1to Δ2-pyrazolines were noted, as was the desilylation of the Δ1-pyrazolines in refluxing methanol. Mechanisms are proposed for the various reactions.

ISSN:0008-4042    

DOI:10.1139/v74-517

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

Chlorine nuclear quadrupole resonance frequencies are reported for the compounds(n= 2,3,4; Y = H, CH3, C2H5, Si(CH3)3, F. OCH3, N3, NR2, Cl, SCH3, P(C6H5)2, As(CH3)2, Mn(CO)5, π-C5H5Fe(CO)2, but not all combinations). The values range from 38.999 MHz (n = 3; Y = F) to 34.668 MHz (n = 2; Y = π-C5H5Fe(CO)2) and are roughly related to the electronegativity of Y and to the ring size. The mean temperature coefficients of the frequencies lie in the range −0.9 × 10−4to −8 × 10−4/°K.

ISSN:0008-4042    

DOI:10.1139/v74-518

出版商:NRC Research Press    

年代:1974

数据来源: NRC

摘要:

A complete analysis is given of the nine-spinproton magnetic resonance spectrum ofp-methylbenzyl bromide as a 20 mol% solution in acetone-d6The long-range coupling constants between methyl and ring protons are the same as those in toluene. The coupling constants between the methylene protons and the other protons in the molecule are consistent with a two-fold barrier of 500 ± 200 cal/mol for the bromomethyl group, the preferred conformation having the C—Br bond in a plane perpendicular to the aromatic plane. An alternative model, in which a C—H bond of the bromomethyl rotor prefers the aromatic plane to the extent of 3 kcal/mol, is considered unlikely.

ISSN:0008-4042    

DOI:10.1139/v74-519

出版商:NRC Research Press    

年代:1974

数据来源: NRC