Photochemical cyclization of diphenylacetylene to phenanthrene

Templeton, William K.

doi:10.1039/c29700001412

Cited by 6 publications

(6 citation statements)

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“…Nitro 2.90 (4) 177 (1) 3.32 (1) °The value of is equal to (Sn-X) -(Sn-X'). 6 Two independent molecules per unit cell. c Four independent molecules per unit cell.…”

Section: Discussionmentioning

confidence: 99%

“…-1202 ( 4) 4384 (4) °Numbers in parentheses are estimated standard deviations. 6 Atoms are labeled to agree with -3283 ( 3)…”

Section: Table II Atomic Coordinates In Crystallinementioning

confidence: 99%

“…(3) 02-Sn-CAl85.4 (1) C3-03-Snd 116.6 (1) 02-Sn-CCl 105.2 (1) H3-03-Snd 103 (3) 03C-Sn-01 168.2 (1) 03-H3-02 142 (3) 03 c-Sn-02 143.2 (1) C1-02-H3 100 (1) 03c-Sn-CBl 78.5 (1) 03c-Sn-CAl 75.0 (1) 03c-Sn-CCl 85.7 (1) Sn-Ol-Cl 118.8 (2) Sn-02-Cl 72.2 (2); See footnote a of TableI 6. See footnote b of TableI.…”

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confidence: 99%

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Pentacoordinated molecules. 55. Intramolecularly formed pentacoordinated structures of triphenyltin esters of salicylic acid, o-anisic acid, and p-methylthiobenzoic acid

Vollano¹,

Day²,

Rau³

et al. 1984

Inorg. Chem.

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“…Nitro 2.90 (4) 177 (1) 3.32 (1) °The value of is equal to (Sn-X) -(Sn-X'). 6 Two independent molecules per unit cell. c Four independent molecules per unit cell.…”

Section: Discussionmentioning

confidence: 99%

“…-1202 ( 4) 4384 (4) °Numbers in parentheses are estimated standard deviations. 6 Atoms are labeled to agree with -3283 ( 3)…”

Section: Table II Atomic Coordinates In Crystallinementioning

confidence: 99%

See 1 more Smart Citation

Pentacoordinated molecules. 55. Intramolecularly formed pentacoordinated structures of triphenyltin esters of salicylic acid, o-anisic acid, and p-methylthiobenzoic acid

Vollano¹,

Day²,

Rau³

et al. 1984

Inorg. Chem.

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“…where Q/r is given by Ae2/r o/r = 9 V/fl + 2A e2/r " The Madelung constant, A, has been evaluated by the single series method of Bertaut (1952), as extended by Templeton (1955) and by Jones & Templeton (1956). A linear charge distribution has been assumed and adequate convergence was ensured.…”

Section: Bond Type In the Dioxides Of Titanium Germanium And Tinmentioning

confidence: 99%

Bond type in the dioxides of titanium, germanium and tin

Ladd¹

1969

Acta Cryst Sect A

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“…Peak overlap was very severe for 135 reflections, which were therefore omitted. An analytical correction for neutron absorption with # = 0.345 mm -1 was made (Templeton & Templeton, 1973). Transmission factors ranged between 0.60 and 0.76, with an average factor of 0.72.…”

Section: Methodsmentioning

confidence: 99%

Structure and Thermal Vibrations of Spermine Phosphate Hexahydrate from Neutron Diffraction Data at 125K

Cohen

Craven²,

Klooster³

1997

Acta Crystallogr Sect B

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Spermine phosphate hexahydrate crystallizes in space group P2(1)/a with unit-cell dimensions a = 7.931 (1), b = 23.158 (5), c = 6.856 (2) A, and beta = 113.44 (2) degrees at 125 K with unit-cell contents [(C10H30N4)2(4+)(HPO4)4(2-).12H2O]. The packing of spermines and monohydrogen phosphates in this crystal structure has features which may be relevant to the binding of spermine to DNA. Another important structural feature is the presence of channels containing water that is hydrogen bonded as in ice-Ih with disordered protons. The channels occur between sheets of spermine long chains and are also bordered by hydrogen-bonded monohydrogen phosphate chains. The hydrogen-bonding scheme of these water chains proposed on the basis of an earlier X-ray study is now confirmed. Nuclear positions, anisotropic mean-square (m.s.) displacements, an overall scale factor and two extinction parameters (rho and g) were refined using full-matrix least-squares giving values of R(F0(2)) = 0.09, Rw(F0(2)) = 0.11 and S = 1.02. Thermal vibrational analysis revealed that the backbone of the spermine cation can be described as a single rigid segment with a substantial libration of 27 deg2 around the spermine molecular long axis.

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Photochemical cyclization of diphenylacetylene to phenanthrene

Abstract: Illumination of a dilute ethanol solution of diphenylacetylene gives phenanthrene in 10% yield.

Cited by 6 publications

References 0 publications

Pentacoordinated molecules. 55. Intramolecularly formed pentacoordinated structures of triphenyltin esters of salicylic acid, o-anisic acid, and p-methylthiobenzoic acid

Pentacoordinated molecules. 55. Intramolecularly formed pentacoordinated structures of triphenyltin esters of salicylic acid, o-anisic acid, and p-methylthiobenzoic acid

Bond type in the dioxides of titanium, germanium and tin

Structure and Thermal Vibrations of Spermine Phosphate Hexahydrate from Neutron Diffraction Data at 125K

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