34. Gamez JA, Yanez M (2013) FAAF (-) (A = O, S, Se, Te) or how electrostatic interactions
influence the nature of the chemical bond. J Chem Theory Comput 9:5211–5215
35. Goddard WA III, Harding LB (1978) The description of chemical bonding from ab initio
calculations. Ann Rev Phys Chem 29:363–396
36. Kovacs A, Esterhuysen C, Frenking G (2005) The nature of the chemical bond revisited: an
energy-partitioning analysis of nonpolar bonds. Chem Eur J 11:1813–1825
37. Ponec R, Cooper DL (2007) Anatomy of bond formation. Bond length dependence of the
extent of electron sharing in chemical bonds from the analysis of domain-averaged Fermi
holes. Faraday Dis 135:31–42
38. Ponec R (2007) Anatomy of bond formation. domain-averaged fermi holes as a tool for the
study of the nature of the chemical bonding in Li(2), Li(4), and F(2). J Phys Chem A
111:11294–11301
39. Bitter T, Ruedenberg K, Schwarz WHE (2007) Toward a physical understanding of
electron-sharing two-center bonds. I. General aspects. J Comput Chem 28:411–422
40. Ruedenberg K, Schmidt MW (2009) Physical understanding through variational reasoning:
electron sharing and covalent bonding. J Phys Chem A 113:1954–1968
41. Ando K (2012) Electron wave packet modeling of chemical bonding: Floating and breathing
minimal packets with perfect-pairing valence-bond spin coupling. Chem Phys Lett 523:134–
138
42. Jacobsen H (2013) Bond descriptors based on kinetic energy densities reveal regions of slow
electrons—another look at aromaticity. Chem Phys Lett 582:144–147
43. Mayer I (2014) Covalent bonding: the role of exchange effects. J Phys Chem A 118:2543–
2546
44. Shaik S, Rzepa HS, Hoffmann R (2013) One molecule, two atoms, three views, four bonds?
Angew Chem Int Ed Engl 52:3020–3033
45. Frenking G, Hermann M (2013) Critical comments on “One molecule, two atoms, three
views, four bonds?”. Angew Chem Int Ed 52:5922–5925
46. Danovich D, Shaik S, Rzepa HS, Hoffmann R (2013) A response to the critical comments on
“One molecule, two atoms, three views, four bonds?”. Angew Chem Int Ed 52:5926–5928
47. Weinhold F, Klein RA (2014) Anti-electrostatic hydrogen bonds. Angew Chem Int Ed
53:11214–11217
48. Frenking G, Caramori GF (2015) No need for a re-examination of the electrostatic notation of
the hydrogen bonding: a comment. Angew Chem Int Ed 54:2596–2599
49. Frenking G, Krapp A (2007) Unicorns in the world of chemical bonding models. J Comput
Chem 28:15–24
50. Frenking G, Shaik S (eds) (2014) The chemical bond, vol 2. Wiley VCH, Weinheim. ISBN
978-3-527-33318-9
51. Schmidt MW, Ivanic J, Ruedenberg K (2014) The physical origin of covalent bonding, the
chemical bond. Wiley-VCH Verlag GmbH & Co. KGaA2014, pp 1–68
52. Coppens P (2013) The interaction between theory and experiment in charge density analysis.
Phys Scr 87:048104
53. Volkov A, Abramov Y, Coppens P, Gatti C (2000) On the origin of topological differences
between experimental and theoretical crystal charge densities. Acta Cryst Sect A 56:332–339
54. Chopra D (2012) Advances in understanding of chemical bonding: inputs from experimental
and theoretical charge density analysis. J Phys Chem A 116:9791–9801
55. Koritsanszky TS, Coppens P (2001) Chemical applications of X-ray charge-density analysis.
Chem Rev 101:1583–1628
56. Gavezzotti A (2013) Crystal formation and stability: physical principles and molecular
simulation. Cryst Res Technol 48:793–810
57. Feynman RP (1939) Forces in molecules. Phys Rev 56:340–343
58. Gatti C (2005) Chemical bonding in crystals: new directions. Zeitschrift Fur Kristallographie
220:399–457
59. Mulliken RS (1928) Assignment of quantum numbers for electrons in molecules. I. Phys Rev
32:186–222
288
J. Andrés et al.
influence the nature of the chemical bond. J Chem Theory Comput 9:5211–5215
35. Goddard WA III, Harding LB (1978) The description of chemical bonding from ab initio
calculations. Ann Rev Phys Chem 29:363–396
36. Kovacs A, Esterhuysen C, Frenking G (2005) The nature of the chemical bond revisited: an
energy-partitioning analysis of nonpolar bonds. Chem Eur J 11:1813–1825
37. Ponec R, Cooper DL (2007) Anatomy of bond formation. Bond length dependence of the
extent of electron sharing in chemical bonds from the analysis of domain-averaged Fermi
holes. Faraday Dis 135:31–42
38. Ponec R (2007) Anatomy of bond formation. domain-averaged fermi holes as a tool for the
study of the nature of the chemical bonding in Li(2), Li(4), and F(2). J Phys Chem A
111:11294–11301
39. Bitter T, Ruedenberg K, Schwarz WHE (2007) Toward a physical understanding of
electron-sharing two-center bonds. I. General aspects. J Comput Chem 28:411–422
40. Ruedenberg K, Schmidt MW (2009) Physical understanding through variational reasoning:
electron sharing and covalent bonding. J Phys Chem A 113:1954–1968
41. Ando K (2012) Electron wave packet modeling of chemical bonding: Floating and breathing
minimal packets with perfect-pairing valence-bond spin coupling. Chem Phys Lett 523:134–
138
42. Jacobsen H (2013) Bond descriptors based on kinetic energy densities reveal regions of slow
electrons—another look at aromaticity. Chem Phys Lett 582:144–147
43. Mayer I (2014) Covalent bonding: the role of exchange effects. J Phys Chem A 118:2543–
2546
44. Shaik S, Rzepa HS, Hoffmann R (2013) One molecule, two atoms, three views, four bonds?
Angew Chem Int Ed Engl 52:3020–3033
45. Frenking G, Hermann M (2013) Critical comments on “One molecule, two atoms, three
views, four bonds?”. Angew Chem Int Ed 52:5922–5925
46. Danovich D, Shaik S, Rzepa HS, Hoffmann R (2013) A response to the critical comments on
“One molecule, two atoms, three views, four bonds?”. Angew Chem Int Ed 52:5926–5928
47. Weinhold F, Klein RA (2014) Anti-electrostatic hydrogen bonds. Angew Chem Int Ed
53:11214–11217
48. Frenking G, Caramori GF (2015) No need for a re-examination of the electrostatic notation of
the hydrogen bonding: a comment. Angew Chem Int Ed 54:2596–2599
49. Frenking G, Krapp A (2007) Unicorns in the world of chemical bonding models. J Comput
Chem 28:15–24
50. Frenking G, Shaik S (eds) (2014) The chemical bond, vol 2. Wiley VCH, Weinheim. ISBN
978-3-527-33318-9
51. Schmidt MW, Ivanic J, Ruedenberg K (2014) The physical origin of covalent bonding, the
chemical bond. Wiley-VCH Verlag GmbH & Co. KGaA2014, pp 1–68
52. Coppens P (2013) The interaction between theory and experiment in charge density analysis.
Phys Scr 87:048104
53. Volkov A, Abramov Y, Coppens P, Gatti C (2000) On the origin of topological differences
between experimental and theoretical crystal charge densities. Acta Cryst Sect A 56:332–339
54. Chopra D (2012) Advances in understanding of chemical bonding: inputs from experimental
and theoretical charge density analysis. J Phys Chem A 116:9791–9801
55. Koritsanszky TS, Coppens P (2001) Chemical applications of X-ray charge-density analysis.
Chem Rev 101:1583–1628
56. Gavezzotti A (2013) Crystal formation and stability: physical principles and molecular
simulation. Cryst Res Technol 48:793–810
57. Feynman RP (1939) Forces in molecules. Phys Rev 56:340–343
58. Gatti C (2005) Chemical bonding in crystals: new directions. Zeitschrift Fur Kristallographie
220:399–457
59. Mulliken RS (1928) Assignment of quantum numbers for electrons in molecules. I. Phys Rev
32:186–222
288
J. Andrés et al.