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ChemWiki: The Dynamic Chemistry E-textbook > Reference > Reference Tables > Atomic and Molecular Properties > A3: Covalent Radii

A3: Covalent Radii

Table of Contents

The values of Table 3 show the covalent radii from the two recent original determinations by Cordero et al.[1], and Pyykkö and Atsumi [2]. The differences between the two single-bond values are often explained by the different coordination numbers in the two data  bases used.  When the effective radii do not follow the natural order single > double > triple, it means that  the changes in the radii of the ligands are even larger than those for the considered element.

 

Atomic Number Element Covalent radii

Single Bonds

[1]

Single Bonds

[2]

Double Bonds

[2]

Triple Bonds

[2]

1 H 31 32    
2 He 28 46    
3 Li 128 133 124  
4 Be 96 102 90 85
5 B 84 85 78 73
6 C 76 75 67 60
7 N 71 71 60 54
8 O 66 63 57 53
9 F 57 64 59 53
10 Ne 58 67 96  
11 Na 166 155 160  
12 Mg 141 139 132 127
13 Al 121 126 113 111
14 Si 111 116 107 102
15 P 107 111 102 94
16 S 105 103 94 95
17 Cl 102 99 95 93
18 Ar 106 96 107 96
19 K 203 196 193  
20 Ca 176 171 147 133
21 Sc 170 148 116 114
22 Ti 160 136 117 108
23 v 153 134 112 106
24 Cr 139 122 111 103
25 Mn 150 119 105 103
26 Fe 142 116 109 102
27 Co 138 111 103 96
28 Ni 124 110 101 101
29 Cu 132 112 115 120
30 Zn 122 118 120  
31 Ga 122 124 117 121
32 Ge 120 121 111 114
33 As 119 121 114 106
34 Se 120 116 107 107
35 Br 120 114 109 110
36 Kr 116 117 121 108
37 Rb 220 210 202  
38 Sr 195 185 157 139
39 Y 190 163 130 124
40 Zr 175 154 127 121
41 Nb 164 147 125 116
42 Mo 154 138 121 113
43 Tc 147 128 120 110
44 Ru 146 125 114 103
45 Rh 142 125 110 106
46 Pd 139 120 117 112
47 Ag 145 128 139 137
48 Cd 144 136 144  
49 In 142 142 136 146
50 Sn 139 140 130 132
51 Sb 139 140 133 127
52 Te 138 136 128 121
53 I 139 133 129 125
54 Xe 140 131 135 122
55 Cs 244 232 209  
56 Ba 215 196 161 149
57 La 207 180 139 139
58 Ce 204 163 137 131
59 Pr 203 176 138 128
60 Nd 201 174 137  
61 Pm 199 173 135  
62 Sm 198 172 134  
63 Eu 198 168 134  
64 Gd 196 169 135 132
65 Tb 194 168 135  
66 Dy 192 167 133  
67 Ho 192 166 133  
68 Er 189 165 133  
69 Tm 190 164 131  
70 Yb 187 170 129  
71 Lu 187 162 131 131
72 Hf 175 152 128 122
73 Ta 170 146 126 119
74 W 162 137 120 115
75 Re 151 131 119 110
76 Os 144 129 116 109
77 Ir 141 122 115 107
78 Pt 136 123 112 110
79 Au 136 124 121 123
80 Hg 132 133 142  
81 Tl 145 144 142 150
82 Pb 146 144 135 137
83 Bi 148 151 141 135
84 Po 140 145 135 129
85 At 150 147 138 138
86 Rn 150 142 145 133
87 Fr 260 223 218  
88 Ra 221 201 173 159
89 Ac 215 186 153 140
90 Th 206 175 143 136
91 Pa 200 169 138 129
92 U 196 170 134 118
93 Np 190 171 136 116
94 Pu 187 172 135  
95 Am 180 166 135  
96 Cm 169 166 136  
97 Bk   168 139  
98 Cf   168 140  
99 Es   165 140  
100 Fm   167    
101 Md   173 139  
102 No   176 159  
103 Lr   161 141  
104 Rf   157 140 131
105 Db   149 136 126
106 Sg   143 128 121
107 Bh   141 128 119
108 Hs   134 125 118
109 Mt   129 125 113
110 Ds   128 116 112
111 Rg   121 116 118
112 Cn   122 137 130
113 Uut   136    
114 Uuq   143    
115 Uup   162    
116 Uuh   175    
117 Uus   165    
118 Uuo   157    

 

References

  1. Beatriz Cordero, Verónica Gómez, Ana E. Platero-Prats, Marc Revés, Jorge Echeverría, Eduard Cremades, Flavia Barragán and Santiago Alvarez (2008). "Covalent radii revisited". Dalton Trans. (21): 2832–2838 http://dx.doi.org/10.1039/b801115j
  2. Pekka Pyykkö, Michiko Atsumi (2009). "Molecular Double-Bond Covalent Radii for Elements Li–E112". Chemistry: A European Journal 15 (46): 12770–12779. http://dx.doi.org/10.1002/chem.200901472

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Last Modified
00:47, 15 Apr 2014

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