-
1
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0042094289
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-
The "18-electron rule" is variously referred to as "effective atomic number rule", "inert gas rule" and "rare gas rule" in the literature. For reviews of the 18-electron rule, see: P.R. Mitchell, and R.V. Parish J. Chem. Educ. 46 1969 811
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J. Chem. Educ.
, vol.46
, pp. 811
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Mitchell, P.R.1
Parish, R.V.2
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5
-
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85168785380
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in press
-
For a discussion of the 18-electron rule in terms of the Complementary Spherical Electron Density Model, see: (a) D.M.P. Mingos, J. Organomet. Chem. (2004), in press
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(2004)
J. Organomet. Chem.
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Mingos, D.M.P.1
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9
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37049101611
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A.G. Orpen, A.V. Rivera, E.G. Bryan, D. Pippard, G.M. Sheldrick, and K.D. Rouse J. Chem. Soc., Chem. Commun. 1978 723
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J. Chem. Soc., Chem. Commun.
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-
Orpen, A.G.1
Rivera, A.V.2
Bryan, E.G.3
Pippard, D.4
Sheldrick, G.M.5
Rouse, K.D.6
-
12
-
-
0039860367
-
-
For a brief overview of 3-center-2-electron interactions, see: R.L. DeKock, and W.B. Bosma J. Chem. Ed. 65 1988 194
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J. Chem. Ed.
, vol.65
, pp. 194
-
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Dekock, R.L.1
Bosma, W.B.2
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17
-
-
0011006369
-
-
For a specific example, see: M.J. Bennett, W.A.G. Graham, J.K. Hoyano, and W.L. Hutcheon J. Am. Chem. Soc. 94 1972 6232
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(1972)
J. Am. Chem. Soc.
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, pp. 6232
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-
Bennett, M.J.1
Graham, W.A.G.2
Hoyano, J.K.3
Hutcheon, W.L.4
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18
-
-
85168790374
-
-
note
-
- ligands equally to each metal, i.e. the anion contributes 1 electron to the electron count of each metal center, both of which bear a +0.5 charge
-
-
-
-
21
-
-
85168792999
-
-
note
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3 fragments. Specifically, the "open" B-B-B interaction employs a p-orbital on the central boron, such that the outer boron atoms are required by symmetry arguments to exhibit an out-of-phase antibonding interaction. For situations with a bridging hydrogen atom, the two outer atoms will always exhibit a bonding interaction, and the classification of "open" and "closed" relates to the magnitude of the interaction. See [12,13]
-
-
-
-
22
-
-
0039321235
-
-
J.P. Olsen, T.F. Koetzle, S.W. Kirtley, M. Andrews, D.L. Tipton, and R. Bau J. Am. Chem. Soc. 96 1974 6621
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J. Am. Chem. Soc.
, vol.96
, pp. 6621
-
-
Olsen, J.P.1
Koetzle, T.F.2
Kirtley, S.W.3
Andrews, M.4
Tipton, D.L.5
Bau, R.6
-
27
-
-
0001628896
-
-
This notation was first introduced to describe B-H-B interactions. See: R.W. Parry, and G. Kodama Coord. Chem. Rev. 128 1993 245
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(1993)
Coord. Chem. Rev.
, vol.128
, pp. 245
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-
Parry, R.W.1
Kodama, G.2
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33
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85168785007
-
-
note
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- fragment
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-
-
-
34
-
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0347582650
-
-
M. Berry, N.J. Cooper, M.L.H. Green, and S.J. Simpson J. Chem. Soc., Dalton Trans. 1980 29
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J. Chem. Soc., Dalton Trans.
, pp. 29
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-
Berry, M.1
Cooper, N.J.2
Green, M.L.H.3
Simpson, S.J.4
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45
-
-
0037021512
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-
See, for example: M.E. García, V. Riera, M.A. Ruiz, D. Sáez, J. Vaissermann, and J.C. Jeffery J. Am. Chem. Soc. 124 2002 14304
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-
García, M.E.1
Riera, V.2
Ruiz, M.A.3
Sáez, D.4
Vaissermann, J.5
Jeffery, J.C.6
-
46
-
-
0037963534
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-
M.E. García, V. Riera, M.A. Ruiz, M.T. Rueda, and D. Sáez Organometallics 21 2002 5515
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(2002)
Organometallics
, vol.21
, pp. 5515
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-
García, M.E.1
Riera, V.2
Ruiz, M.A.3
Rueda, M.T.4
Sáez, D.5
-
48
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-
37049090395
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-
J.C. Green, M.L.H. Green, D. O'Hare, R.R. Watson, and J.A. Bandy J. Chem. Soc., Dalton Trans. 1987 391
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J. Chem. Soc., Dalton Trans.
, pp. 391
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-
Green, J.C.1
Green, M.L.H.2
O'Hare, D.3
Watson, R.R.4
Bandy, J.A.5
-
53
-
-
0000275676
-
-
+ adopting a monohapto agostic interaction, see: B.E. Bursten, and R.H. Cayton Organometallics 5 1986 1051 and references therein
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(1986)
Organometallics
, vol.5
, pp. 1051
-
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Bursten, B.E.1
Cayton, R.H.2
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54
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0038262003
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-
3) has recently been reported, although it has not been structurally characterized by X-ray diffraction. See: M.E. García, S. Melón, A. Ramos, V. Riera, M.A. Ruiz, D. Belletti, C. Graiff, and A. Tiripicchio Organometallics 22 2003 1983
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(2003)
Organometallics
, vol.22
, pp. 1983
-
-
García, M.E.1
Melón, S.2
Ramos, A.3
Riera, V.4
Ruiz, M.A.5
Belletti, D.6
Graiff, C.7
Tiripicchio, A.8
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62
-
-
0141479168
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-
Indeed, the metal-metal separation in dinuclear complexes with bridging ligands and no metal-metal bond may be shorter than unbridged complexes with a metal-metal bond. See, for example: H. Vahrenkamp Angew. Chem., Int. Ed. Engl. 17 1978 379
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(1978)
Angew. Chem., Int. Ed. Engl.
, vol.17
, pp. 379
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-
Vahrenkamp, H.1
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64
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0344980986
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-
P.D. Grebenik, M.L.H. Green, A. Izquierdo, V.S.B. Mtetwa, and K. Prout J. Chem. Soc., Dalton Trans. 1987 9
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J. Chem. Soc., Dalton Trans.
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-
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Grebenik, P.D.1
Green, M.L.H.2
Izquierdo, A.3
Mtetwa, V.S.B.4
Prout, K.5
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65
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37049075764
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-
J.C. Green, M.L.H. Green, P. Mountford, and M.J. Parkington J. Chem. Soc., Dalton Trans. 1990 3407
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J. Chem. Soc., Dalton Trans.
, pp. 3407
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-
Green, J.C.1
Green, M.L.H.2
Mountford, P.3
Parkington, M.J.4
-
67
-
-
85168784908
-
-
note
-
Note that these specific compounds have been selected because the bond order assignment is independent of electron count method used because none of the bridges are involved in 3-center-2-electron interactions
-
-
-
-
68
-
-
85168788613
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-
note
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2 configuration results such that the Mo-Mo bond order is zero. See [45]
-
-
-
-
72
-
-
33847798578
-
-
b: M.H. Chisholm, F.A. Cotton, B.A. Frenz, W.W. Reichert, L.W. Shive, and B.R. Stults J. Am. Chem. Soc. 98 1976 4469
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-
Chisholm, M.H.1
Cotton, F.A.2
Frenz, B.A.3
Reichert, W.W.4
Shive, L.W.5
Stults, B.R.6
-
74
-
-
0024788971
-
-
For some calculations on dinuclear chromium complexes with bridging methyl ligands, see: S.K. Noh, S.C. Sendlinger, C. Janiak, and K.H. Theopold J. Am. Chem. Soc. 111 1989 9127
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Noh, S.K.1
Sendlinger, S.C.2
Janiak, C.3
Theopold, K.H.4
-
78
-
-
85168791908
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-
note
-
Wiberg's bond index is often denoted as P. We use W to avoid confusion with the density matrix, which is widely abbreviated as P, as we do here
-
-
-
-
82
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0034742928
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-
A.J. Bridgeman, G. Cavigliasso, L.R. Ireland, and J. Rothery J. Chem. Soc., Dalton Trans. 2001 2095
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Bridgeman, A.J.1
Cavigliasso, G.2
Ireland, L.R.3
Rothery, J.4
-
84
-
-
85168786065
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-
note
-
There are five more unoccupied metal-dominated MOs to complete the set of 10 MOs relevant for the dimetallic complex, all of which are indicated in Fig. 11. However, because they are not of much significance for the goal of this investigation, they are not further discussed
-
-
-
-
85
-
-
8644235229
-
-
Specifically, the ionization bands assigned to the M(μ-H)M interactions showed a marked variation in intensity in the HeI and HeII spectra, indicating a significant contribution from the hydrogen 1s orbital which is known to be sensitive to such changes: J.C. Green, D.M. Mingos, and E.A. Seddon Inorg. Chem. 20 1981 2595
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(1981)
Inorg. Chem.
, vol.20
, pp. 2595
-
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Green, J.C.1
Mingos, D.M.2
Seddon, E.A.3
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89
-
-
0004233970
-
-
2nd ed. VCH New York
-
2M] bond and one 2-centered M-M bond. However, a double 2-centered-2-electron MM interaction is not a viable alternative since there would be no orbitals available on M for interaction with the hydrogen atoms. See, for example: C. Elschenbroich, and A. Salzer Organometallics 2nd ed. 1992 VCH New York p. 79
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(1992)
Organometallics
-
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Elschenbroich, C.1
Salzer, A.2
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100
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0012418733
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-
R.H. Crabtree, H. Felkin, G.E. Morris, T.J. King, and J.A. Richards J. Organomet. Chem. 113 1976 C7
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Crabtree, R.H.1
Felkin, H.2
Morris, G.E.3
King, T.J.4
Richards, J.A.5
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103
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0001762695
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R.C. Stevens, M.R. McLean, T. Wen, J.D. Carpenter, R. Bau, and T.F. Koetzle Inorg. Chim. Acta 161 1989 223
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Inorg. Chim. Acta
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Stevens, R.C.1
McLean, M.R.2
Wen, T.3
Carpenter, J.D.4
Bau, R.5
Koetzle, T.F.6
-
107
-
-
0001047625
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-
3CO where the apparently >18electron count is deceiving because one of the ligand orbital combinations remains nonbonding as a result of there being no metal based orbital of appropriate symmetry with which to interact; the electron count at the metal in such complexes is thus reduced from 20 to 18. See, for example: H. Jacobsen, H. Berke, T. Brackemeyer, T. Eisenblätter, G. Erker, R. Fröhlich, O. Meyer, and K. Bergander Helv. Chim. Acta 81 1998 1692
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Jacobsen, H.1
Berke, H.2
Brackemeyer, T.3
Eisenblätter, T.4
Erker, G.5
Fröhlich, R.6
Meyer, O.7
Bergander, K.8
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114
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33751500540
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M.H. Schofield, T.P. Kee, J.T. Anhaus, R.R. Schrock, K.H. Johnson, and W.M. Davis Inorg. Chem. 30 1991 3595
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Schofield, M.H.1
Kee, T.P.2
Anhaus, J.T.3
Schrock, R.R.4
Johnson, K.H.5
Davis, W.M.6
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120
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0001042963
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H. Suzuki, H. Omori, D.H. Lee, Y. Yoshida, and Y. Moro-oka Organometallics 7 1988 2243
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Organometallics
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Suzuki, H.1
Omori, H.2
Lee, D.H.3
Yoshida, Y.4
Moro-Oka, Y.5
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121
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85168778045
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4 was originally reported in an incorrect space group. See: R.E. Marsh Organometallics 8 1989 1583
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(1989)
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, vol.8
, pp. 1583
-
-
Marsh, R.E.1
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123
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0000447083
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This view of the bonding has been accepted by the original authors. See: H. Suzuki, H. Omori, D.H. Lee, Y. Yoshida, M. Fukushima, M. Tanaka, and Y. Morooka Organometallics 13 1994 1129
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Organometallics
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Suzuki, H.1
Omori, H.2
Lee, D.H.3
Yoshida, Y.4
Fukushima, M.5
Tanaka, M.6
Morooka, Y.7
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126
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0003438540
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3rd ed. Cornell University Press Ithaca, NY
-
The formal charge (FC) of an atom in a given Lewis structure is the charge it would possess if the electrons in each covalent bond were to be distributed equally between the two bonded atoms such that each partner receives one electron. The notion of formal charge as disussed by Pauling is based on Langmuir's residual charge concept. L. Pauling The Nature of The Chemical Bond 3rd ed. 1960 Cornell University Press Ithaca, NY p. 9
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(1960)
The Nature of the Chemical Bond
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Pauling, L.1
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128
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33845554112
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See, for example: A. Greenberg, R. Winkler, B.L. Smith, and J.F. Liebman J. Chem. Educ. 59 1982 367
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Greenberg, A.1
Winkler, R.2
Smith, B.L.3
Liebman, J.F.4
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131
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0035569080
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Furthermore, it is well known that the charge on an atom generally bears no relationship to oxidation state. For a brief discussion, including the problem with actually calculating the charge, see: R. Hoffmann Am. Sci. 89 2001 311
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Hoffmann, R.1
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132
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0000441172
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Bulky substituents on the cyclopentadienyl rings enable the isolation of monomeric zirconocene hydride complexes. See, for example: P.J. Chirik, M.W. Day, and J.E. Bercaw Organometallics 18 1999 1873
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Chirik, P.J.1
Day, M.W.2
Bercaw, J.E.3
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133
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33947435455
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2 that would be predicted using a "half-electron" counting method. The bonding in diborane was initially described as a "protonated double bond". See: K.S. Pitzer J. Am. Chem. Soc. 67 1945 1126
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J. Am. Chem. Soc.
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Pitzer, K.S.1
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134
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85168777191
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note
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s is the number of BHB bridge bonds, t the number of BBB three-center bonds, y number of B-B single bonds, and x is the number of terminal B-H groups
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For example, see: A.J. Lupinetti, S. Fau, G. Frenking, and S.H. Strauss J. Phys. Chem. (A) 101 1997 9551
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