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1Electron Diffraction Studies of the Hydrides Si2H6 and P2H4

B BEAGLEY,JM FREEMAN,AR CONRAD,BG NORTON,GC HOLYWELL,JJ MONAGHAN

The molecular structures of disilane and diphosphine have been studied in the gas phase by electron diffraction. In disilane, Si-Si = 2.331 ± 0.003 Å, Si-H = 1.492 ± 0.003 Å, ∠SiSiH = 110.3 ± 0.4°; the Si-Si bond length is 0.021 ± 0.003 Å shorter than found in silicon. In diphosphine, P-P = 2.218 ± 0.004 Å, P-H = 1.451 ± 0.005 Å, ∠PPH = 95.2 ± 0.6°, ∠HPH = 91.3 ± 1.4°. Although refinement of the dihedral angle converged at 81°, free rotation about the P-P bond cannot be ruled out. The P-P bond length in P2H4 is 0.026 ± 0.010 Å shorter than found in P2(CH3)4. This shortening follows the pattern observed in the sulphur system, where a difference of 0.033 ±0.003 Å is observed between the S-S lengths in H2S2 and (CH3)2S2; no such difference occurs in the silicon system.

1972Journal of Molecular Structure（1972）引用：208

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2ChemInform Abstract: DIE MOLEKUELSTRUKTUR VON TRIFLUORPHOSPHINMOLYBDAENPENTACARBONYL (I)

D. M. BRIDGES,G. C. HOLYWELL,D. W. H. RANKIN,J. M. FREEMAN

Chemischer InformationsdienstVolume 3, Issue 4 Organoelement Compounds ChemInform Abstract: DIE MOLEKUELSTRUKTUR VON TRIFLUORPHOSPHINMOLYBDAENPENTACARBONYL (I) D. M. BRIDGES, D. M. BRIDGESSearch for more papers by this authorG. C. HOLYWELL, G. C. HOLYWELLSearch for more papers by this authorD. W. H. RANKIN, D. W. H. RANKINSearch for more papers by this authorJ. M. FREEMAN, J. M. FREEMANSearch for more papers by this author D. M. BRIDGES, D. M. BRIDGESSearch for more papers by this authorG. C. HOLYWELL, G. C. HOLYWELLSearch for more papers by this authorD. W. H. RANKIN, D. W. H. RANKINSearch for more papers by this authorJ. M. FREEMAN, J. M. FREEMANSearch for more papers by this author First published: January 25, 1972 https://doi.org/10.1002/chin.197204353Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume3, Issue4January 25, 1972 RelatedInformation

1972Chemischer Informationsdienst（1972）

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3The Molecular Structure of Pentacarbonyl(trifluorophosphine)molybdenum

DM BRIDGES,GC HOLYWELL,DWH RANKIN,JM FREEMAN

The molecular structure of pentacarbonyl(trifluorophosphine)molybdenum, PF3Mo(CO)5, in the gas phase has been determined by the sector-microphotometer method of electron diffraction. The principal bond lengths and angles are: r(CO) 1.154±0.005, r(MoC) 2.063±0.006, r(MoP) 2.369±0.010, r(PF) 1.557±0.004 Å, < (FPF) 99.5±0.5°. Several methods of describing the partial wave phase shifts have been used, and their relative merits are discussed.

1971JOURNAL OF ORGANOMETALLIC CHEMISTRY（1971）引用：84

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4Electron Diffraction Determination of the Molecular Structures of Dimethylaminodifluorophosphine and Aminodifluorophosphine in the Gas Phase

GC HOLYWELL,DWH RANKIN,B BEAGLEY,JM FREEMAN

The molecular structures of dimethylaminodifluorophosphine, Me2NPF2, and aminodifluorophosphine, H2NPF2, in the gas phase have been determined by the sector-microphotometer method of electron diffraction. The principal parameters for dimethylaminodifluorophosphine are: r(P–F) 1·589 ± 0·003, r(P–N) 1·684 ± 0·008, r(C–N) 1·448 ± 0·006 Å; P–N–C 118·3 ± 0·6°, and C–N–C 111·8 ± 1·5°; for aminodifluorophosphine r(P–F) 1·581 ± 0·003, and r(P–N) 1·661 ± 0·007 Å. The positions of the hydrogen atoms are not well defined, but the angles at nitrogen are probably close to those at nitrogen in the dimethyl compound. Both molecules adopt a staggered conformation.

1971Journal of the Chemical Society A, Inorganic, physical, theoretical（1971）引用：123

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5ChemInform Abstract: BESTIMMUNG DER MOLEKULARSTRUKTUR VON DIMETHYLAMINODIFLUORPHOSPHIN UND AMINODIFLUORPHOSPHIN IN DER GASPHASE DURCH ELEKTRONENBEUGUNG

G. C. HOLYWELL,D. W. H. RANKIN,B. BEAGLEY,J. M. FREEMAN

Chemischer Informationsdienst. Organische ChemieVolume 2, Issue 24 Organoelement Compounds ChemInform Abstract: BESTIMMUNG DER MOLEKULARSTRUKTUR VON DIMETHYLAMINODIFLUORPHOSPHIN UND AMINODIFLUORPHOSPHIN IN DER GASPHASE DURCH ELEKTRONENBEUGUNG G. C. HOLYWELL, G. C. HOLYWELLSearch for more papers by this authorD. W. H. RANKIN, D. W. H. RANKINSearch for more papers by this authorB. BEAGLEY, B. BEAGLEYSearch for more papers by this authorJ. M. FREEMAN, J. M. FREEMANSearch for more papers by this author G. C. HOLYWELL, G. C. HOLYWELLSearch for more papers by this authorD. W. H. RANKIN, D. W. H. RANKINSearch for more papers by this authorB. BEAGLEY, B. BEAGLEYSearch for more papers by this authorJ. M. FREEMAN, J. M. FREEMANSearch for more papers by this author First published: June 15, 1971 https://doi.org/10.1002/chin.197124013AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume2, Issue24June 15, 1971 RelatedInformation

1971Chemischer Informationsdienst Organische Chemie

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6An Electron Diffraction Determination of the Molecular Structures of Trichloro- and Trifluoro-Silyl-dimethylamine

W AIREY,C GLIDEWELL,AG ROBIETTE,GM SHELDRICK,JM FREEMAN

The molecular structures of Cl3SiNMe2 and F3SiNMe2 have been determined in the vapour phase by the sector microphotometer method of electron diffraction. Both molecules are found to possess planar heavy-atom skeletons, after a small correction for shrinkage. The principal bond lengths are: Si-Cl = 2.023 ± 0.005, Si-F = 1.567 ± 0.006, Si-N = 1.657 ± 0.012 and 1.654 ± 0.015 Å, respectively, C-N = 1.446 ± 0.012 and 1.433 ± 0.015 Å respectively.

1971Journal of Molecular Structure（1971）引用：57

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7ChemInform Abstract: ELEKTRONENBEUGUNG AN PHENYLSILYLAETHER(I)

C. GLIDEWELL,D. W. H. RANKIN,A. G. ROBIETTE,B. BEAGLEY,J. M. FREEMAN

AbstractDie Molekularstruktur des Äthers (I), der aus Phenol und Disilylsulfid nach bekannten Methoden erhalten wird, wird durch Elektronenbeugung bestimmt.

1970Chemischer Informationsdienst Organische Chemie

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8An Electron Diffraction Determination of the Molecular Structure of Methyl Silyl Ether

GLIDEWEL.C,DW RANKIN,AG ROBIETTE,SHELDRIC.GM,B BEAGLEY,JM FREEMAN

The molecular structure of methyl silyl ether CH3OSiH3, has been deter- mined in the gas phase by the sector microphotometer method of electron, diffrac- tion. The Si-O bond length is 1.640±0.003 Å, the C-O bond length is 1.418±0.009 Å, and the Si-O-C angle is 120.6±0.9°.

1970JOURNAL OF MOLECULAR STRUCTURE（1970）引用：103

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9Electron Diffraction Study of Phenyl Silyl Ether

C GLIDEWELL, DWH RANKIN,AG ROBIETTE,SHELDRIC.GM,B BEAGLEY,JM FREEMAN

The molecular structure of phenyl silyl ether C6H5OSiH3 has been studied by the sector-microphotometer method of electron diffraction. The Si—O bond length is 1.648 ± 0.007 Å, the C—O bond length is 1.357 ± 0.009 Å, the Si—O—C angle is 121 ± 1° and the dihedral angle between the Si—O—C plane and the aromatic ring is 68 ± 3°. These results are discussed and compared with those for similar molecules.

1969Transactions of the Faraday Society（1969）引用：37

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10On the Iterative Calculation of the Geometry of Molecules

JM FREEMAN

A method is described whereby the Cartesian coordinates of a set of points, or the direction consines of the lines joining the points, can be calculated by an iterative method from any information which is sufficient to define the system. The method is particularly suitable for the calculation of G matrices in vibrational analysis, for which a program in KDF-9 Algol has been written.

1969Journal of Molecular Spectroscopy（1969）引用：10

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