Radio covalent

O radio covalent ye, en quimica, a metat d'a distancia entre dos atomos iguals que forman un enlace covalent. Por un regular s'esprisa en picometros (pm) o ångströms (Å), a on 1 Å = 100 pm.

A suma de dos radios covalents habría d'estar a largaria d'o enlace covalent entre os dos atomos. Manimenos, ista relación no se cumple de forma exacta ya que a grandaria d'un atomo no ye constant. Iste pende d'o entorno quimico a on se trobe. Por un regular a largaria d'o enlace covalent tiende a estar menor que lo que a suma de radios covalents. En conseqüencia, as valuras tabulatas de radios covalents que se troban en a bibliografía son valuras ideyalizatas u promediatas.

Tabla de radios covalentes

Contino s'amostran os radios d'os enlaces calculatos d'un modo auto-consistent. A suma d'os dos radios mos da a largaria d'enlace, R (AB) = r (A) + r (B).

ZSimbolor (Å)[1] r1(Å)[2]r2(Å)[3] r3(Å)[4]
1H0.31(5)0.32
2He0.280.46
3Li1.28(7)1.331.24
4Be0.96(3)1.020.900.85
5B0.84(3)0.850.780.73
6C (sp3)0.76(1)0.75
C (sp2)0.73(2)0.67
C (sp)0.69(1)0.60
7N0.71(1)0.710.600.54
8O0.66(2)0.630.570.53
9F0.57(3)0.640.590.53
10Ne0.580.670.96
11Na1.66(9)1.551.60
12Mg1.41(7)1.391.321.27
13Al1.21(4)1.261.131.11
14Si1.11(2)1.161.071.02
15P1.07(3)1.111.020.94
16S1.05(3)1.030.940.95
17Cl1.02(4)0.990.950.93
18Ar1.06(10)0.961.070.96
19K2.03(12)1.961.93
20Ca1.76(10)1.711.471.33
21Sc1.70(7)1.481.161.14
22Ti1.60(8)1.361.171.08
23V1.53(8)1.341.121.06
24Cr1.39(5)1.221.111.03
25Mn (low spin)1.39(5)
Mn (high spin)1.61(8)
Mn1.191.051.03
26Fe (low spin)1.32(3)
Fe (high spin)1.52(6)
Fe1.161.091.02
27Co (low spin)1.26(3)
Co (high spin)1.50(7)
Co1.111.030.96
28Ni1.24(4)1.101.011.01
29Cu1.32(4)1.121.151.20
30Zn1.22(4)1.181.20
31Ga1.22(3)1.241.171.21
32Ge1.20(4)1.211.111.14
33As1.19(4)1.211.141.06
34Se1.20(4)1.161.071.07
35Br1.20(3)1.141.091.10
36Kr1.16(4)1.171.211.08
37Rb2.20(9)2.12.02
38Sr1.95(10)1.851.571.39
39Y1.90(7)1.631.31.24
40Zr1.75(7)1.541.271.21
41Nb1.64(6)1.471.251.16
42Mo1.54(5)1.381.211.13
43Tc1.47(7)1.281.21.1
44Ru1.46(7)1.251.141.03
45Rh1.42(7)1.251.11.06
46Pd1.39(6)1.21.171.12
47Ag1.45(5)1.281.391.37
48Cd1.44(9)1.361.44
49In1.42(5)1.421.361.46
50Sn1.39(4)1.41.31.32
51Sb1.39(5)1.41.331.27
52Te1.38(4)1.361.281.21
53I1.39(3)1.331.291.25
54Xe1.40(9)1.311.351.22
55Cs2.44(11)2.322.09
56Ba2.15(11)1.961.611.49
57La2.07(8)1.81.391.39
58Ce2.04(9)1.631.371.31
59Pr2.03(7)1.761.381.28
60Nd2.01(6)1.741.37
61Pm1.991.731.35
62Sm1.98(8)1.721.34
63Eu1.98(6)1.681.34
64Gd1.96(6)1.691.351.32
65Tb1.94(5)1.681.35
66Dy1.92(7)1.671.33
67Ho1.92(7)1.661.33
68Er1.89(6)1.651.33
69Tm1.90(10)1.641.31
70Yb1.87(8)1.71.29
71Lu1.87(8)1.621.311.31
72Hf1.75(10)1.521.281.22
73Ta1.70(8)1.461.261.19
74W1.62(7)1.371.21.15
75Re1.51(7)1.311.191.1
76Os1.44(4)1.291.161.09
77Ir1.41(6)1.221.151.07
78Pt1.36(5)1.231.121.1
79Au1.36(6)1.241.211.23
80Hg1.32(5)1.331.42
81Tl1.45(7)1.441.421.5
82Pb1.46(5)1.441.351.37
83Bi1.48(4)1.511.411.35
84Po1.40(4)1.451.351.29
85At1.501.471.381.38
86Rn1.501.421.451.33
87Fr2.602.232.18
88Ra2.21(2)2.011.731.59
89Ac2.151.861.531.4
90Th2.06(6)1.751.431.36
91Pa2.001.691.381.29
92U1.96(7)1.71.341.18
93Np1.90(1)1.711.361.16
94Pu1.87(1)1.721.35
95Am1.80(6)1.661.35
96Cm1.69(3)1.661.36
97Bk1.661.39
98Cf1.681.4
99Es1.651.4
100Fm1.67
101Md1.731.39
102No1.761.59
103Lr1.611.41
104Rf1.571.41.31
105Db1.491.361.26
106Sg1.431.281.21
107Bh1.411.281.19
108Hs1.341.251.18
109Mt1.291.251.13
110Ds1.281.161.12
111Rg1.211.161.18
112Cn1.221.371.3
113Uut1.36
114Uuq1.43
115Uup1.62
116Uuh1.75
117Uus1.65
118Uuo1.57

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Referencias

  1. Beatriz Cordero, Verónica Gómez, Ana E. Platero-Prats, Marc Revés, Jorge Echeverría, Eduard Cremades, Flavia Barragán and Santiago Alvarez. Covalent radii revisited. Dalton Trans., 2008, 2832-2838, DOI 10.1039/b801115j.
  2. P. Pyykkö, M. Atsumi,Chem. Eur. J., 15, 2009,186-197 DOI 10.1002/chem.200800987
  3. P. Pyykkö, M. Atsumi,Chem. Eur. J., 15, 2009,12770–12779 DOI 10.1002/chem.200901472.
  4. P. Pyykkö, S. Riedel, M. Patzschke,Chem. Eur. J., 11, 2005,3511–3520 Plantilla:Doi.

Radio covalent

O radio covalent ye, en quimica, a metat d\'a distancia entre dos atomos iguals que forman un enlace covalent. Por un regular s\'esprisa en picometros (pm) o ångströms (Å), a on 1 Å = 100 pm.