Diphenylmethane
- Formula: C13H12
- Molecular weight: 168.2344
- IUPAC Standard InChIKey: CZZYITDELCSZES-UHFFFAOYSA-N
- CAS Registry Number: 101-81-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Benzene, 1,1'-methylenebis-; Methane, diphenyl-; Benzene, (phenylmethyl)-; Benzylbenzene; Ditan; Ditane; Benzene, benzyl-; Toluene, α-phenyl-; 1,1'-Dimethylenebis(benzene); NSC 4708
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Gas phase ion energetics data
Go To: Top, Ion clustering data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 191.7 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 183.9 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
<0.156 ± 0.043 | ECD | Wojnarovits and Foldiak, 1981 | EA is an upper limit: Chen and Wentworth, 1989. G3MP2B3 calculations indicate an EA of ca. -0.3 eV, anion unbound.; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.4 | EI | Terlouw, Heerma, et al., 1974 | LLK |
8.7 ± 0.1 | EI | Bohlmann, Koppel, et al., 1974 | LLK |
8.55 ± 0.03 | PI | Potapov, Kardash, et al., 1972 | LLK |
9.00 ± 0.05 | EI | Pignataro, Mancini, et al., 1972 | LLK |
8.67 ± 0.05 | PE | Distefano, Pignataro, et al., 1976 | Vertical value; LLK |
8.8 | PE | Eaton and Traylor, 1974 | Vertical value; LLK |
8.80 ± 0.02 | PE | Maier and Turner, 1973 | Vertical value; LLK |
9.1 | PE | Pignataro, Mancini, et al., 1971 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C7H7+ | 11.5 ± 0.1 | C6H5 | EI | Innorta, Torroni, et al., 1973 | LLK |
C13H9+ | 14.9 ± 0.1 | H2+H | EI | Rapp, Staab, et al., 1970 | RDSH |
C13H11+ | 11.2 ± 0.1 | H | EI | Bohlmann, Koppel, et al., 1974 | LLK |
De-protonation reactions
C13H11- + =
By formula: C13H11- + H+ = C13H12
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 363.6 ± 2.1 | kcal/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
ΔrH° | 361.3 ± 2.3 | kcal/mol | G+TS | Cumming and Kebarle, 1978 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 358.2 ± 2.0 | kcal/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
ΔrG° | 355.9 ± 2.0 | kcal/mol | IMRE | Cumming and Kebarle, 1978 | gas phase; B |
Ion clustering data
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
By formula: Cl- + C13H12 = (Cl- • C13H12)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrG° | 7.40 | kcal/mol | TDEq | French, Ikuta, et al., 1982 | gas phase; B |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
7.4 | 300. | PHPMS | French, Ikuta, et al., 1982 | gas phase; M |
Mass spectrum (electron ionization)
Go To: Top, Gas phase ion energetics data, Ion clustering data, Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Chemical Concepts |
NIST MS number | 152251 |
Gas Chromatography
Go To: Top, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-1 | 200. | 1448.7 | Giumanini, Verardo, et al., 2001 | |
Capillary | SE-30 | 100. | 1414.6 | Tudor, 1997 | 40. m/0.35 mm/0.35 μm |
Capillary | DB-1 | 160.00 | 1423.5 | van Haelst, van der Wielen, et al., 1996 | 30. m/0.32 mm/0.25 μm, He |
Capillary | DB-1 | 170.00 | 1429.8 | van Haelst, van der Wielen, et al., 1996 | 30. m/0.32 mm/0.25 μm, He |
Capillary | OV-101 | 140. | 1412.4 | Gerasimenko, Kirilenko, et al., 1981 | N2; Column length: 50. m; Column diameter: 0.3 mm |
Capillary | OV-101 | 160. | 1429.4 | Gerasimenko, Kirilenko, et al., 1981 | N2; Column length: 50. m; Column diameter: 0.3 mm |
Packed | SE-30 | 150. | 1415. | Shlyakhov, Anvaer, et al., 1975 | |
Packed | SE-30 | 200. | 1449. | Shlyakhov, Anvaer, et al., 1975 | |
Packed | Apiezon L | 150. | 1458. | Shlyakhov, Anvaer, et al., 1975 |
Kovats' RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Carbowax 20M | 1980. | Toda, Mihara, et al., 1983 | 2. K/min; Column length: 50. m; Column diameter: 0.23 mm; Tstart: 80. C; Tend: 200. C |
Capillary | Carbowax 20M | 1984. | Toda, Mihara, et al., 1983 | 2. K/min; Column length: 50. m; Column diameter: 0.23 mm; Tstart: 80. C; Tend: 200. C |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | OV-1 | 1405.2 | Gautzsch and Zinn, 1996 | 8. K/min; Tstart: 35. C; Tend: 300. C |
Capillary | SE-54 | 1418.1 | Shapi and Hesso, 1990 | 25. m/0.32 mm/0.15 μm, He, 40. C @ 1. min, 5. K/min, 280. C @ 15. min |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | CP-Sil5 CB MS | 1403.9 | Helmig, Bocquet, et al., 2004 | 60. m/0.32 mm/0.25 μm, He; Program: 40C(1min) => 25C/min => 120C => 2C/min => 190C => 25C/min => 250C (5min) |
Capillary | DB-1 | 1380.1 | Helmig, Bocquet, et al., 2004 | 30. m/0.32 mm/0.1 μm, He; Program: 40C(5min) => 20C/min => 100C => 2C/min => 160C => 40C/min => 250C (5min) |
Capillary | DB-1 | 1389.6 | Helmig, Bocquet, et al., 2004 | 30. m/0.32 mm/0.25 μm, He; Program: 40C(5min) => 20C/min => 100C => 2C/min => 160C => 40C/min => 250C (5min) |
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-101 | 120. | 1412. | Nabivach and Gerasimenko, 1996 | |
Capillary | Polidimethyl siloxane | 130. | 1401. | Nabivach and Gerasimenko, 1996 | |
Capillary | Polidimethyl siloxane | 130. | 1406. | Nabivach and Gerasimenko, 1996 |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Ultra-1 | 1400. | Elizalde-González, Hutfliess, et al., 1996 | 50. m/0.2 mm/0.33 μm, H2, 3. K/min, 300. C @ 35. min; Tstart: 60. C |
Capillary | Ultra-1 | 1393. | Okumura, 1991 | 25. m/0.32 mm/0.25 μm, He, 3. K/min; Tstart: 80. C; Tend: 260. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-1 | 1424. | Grigor'ev, Bozhko, et al., 2009 | Helium; Program: not specified |
Capillary | DB-1 | 1380.1 | Helmig, Revermann, et al., 2003 | 30. m/0.32 mm/0.1 μm, He; Program: 40C (2min) => 20C/min => 80C => 3C/min => 145C => 45C/min => 225C (3min) |
Capillary | DB-1 | 1416. | Peng, 1996 | 30. m/0.53 mm/1.5 μm; Program: 40 0C (4 min) 8 0C/min -> 200 0C (1 min) 5 0C/min -> 280 0C (20 min) |
Capillary | Methyl Silicone | 1403. | Zenkevich, 1994 | Program: not specified |
Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 1461. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 1994. | Peng, 1996 | 30. m/0.53 mm/1.0 μm; Program: 40 0C (4 min) 4 0C/min -> 200 0C (20 min) |
Capillary | DB-Wax | 1994. | Peng, Yang, et al., 1991 | Program: not specified |
Lee's RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-5 | 247.0 | Wang, Hou, et al., 2007 | 30. m/0.30 mm/0.25 μm, Helium, 50. C @ 5. min, 5. K/min, 200. C @ 15. min |
Capillary | HP-5 | 241.6 | Shao, Wang, et al., 2006 | 30. m/0.3 mm/0.25 μm, He, 50. C @ 5. min, 5. K/min, 200. C @ 15. min |
Capillary | HP-5 | 249.09 | Marynowski, Pieta, et al., 2004 | 60. m/0.25 mm/0.25 μm, He, 3. K/min; Tstart: 35. C; Tend: 300. C |
Capillary | HP-5 | 249.09 | Marynowski, Pieta, et al., 2004 | 60. m/0.25 mm/0.25 μm, He, 3. K/min; Tstart: 35. C; Tend: 300. C |
Capillary | HP-5 | 245.77 | Piao, Chu, et al., 1999 | 30. m/0.25 mm/0.25 μm, 50. C @ 2. min, 4. K/min, 280. C @ 20. min |
Capillary | BPX-5 | 243.4 | Schwarzbauer, Franke, et al., 1999 | 50. m/0.25 mm/0.25 μm, He, 50. C @ 3. min, 3. K/min; Tend: 300. C |
Capillary | CP Sil 8 CB | 245.6 | Bundt, Herbel, et al., 1991 | 50. m/0.25 mm/0.25 μm, He, 4. K/min; Tstart: 80. C; Tend: 300. C |
Capillary | SE-54 | 245.56 | Guillén, Blanco, et al., 1989 | 20. m/0.22 mm/0.20 μm, He, 4. K/min; Tstart: 50. C; Tend: 300. C |
Capillary | SE-52 | 243.35 | Lee, Vassilaros, et al., 1979 | 12. m/0.3 mm/0.34 μm, He, 2. K/min; Tstart: 50. C; Tend: 250. C |
Lee's RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | CP Sil 8 CB | 245.6 | Bundt, Herbel, et al., 1991 | 50. m/0.25 mm/0.25 μm, He; Program: not specified |
References
Go To: Top, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
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Electron capture detection of aromatic hydrocarbons,
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Experimental Determination of Electron Affinities of Organic Molecules,
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Massenspektrometrische Untersuchung isomerer Kohlenwasserstoffe: Struktur und Bildungsenthalpie stabiler (C13H11+) Ionen,
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Distortional stabilization in phenyl participations,
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The activation energy as guiding factor in the fragmentation of substituted diphenylmethanes,
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The gas phase acidity scale from methanol to phenol,
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Retention Indices for Programmed-Temperature Capillary-Column Gas Chromatography of Polycyclic Aromatic Hydrocarbons,
Anal. Chem., 1979, 51, 6, 768-773, https://doi.org/10.1021/ac50042a043
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Notes
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- Symbols used in this document:
AE Appearance energy EA Electron affinity T Temperature ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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