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. Author manuscript; available in PMC: 2018 May 19.
Published in final edited form as: Inorg Chem. 2015 Jul 13;54(15):7579–7592. doi: 10.1021/acs.inorgchem.5b01163

Table 4.

Ultrashort Cr—Cr Bond Distances in Selected Cr2 Systems

Cr2 complex d(Cr—Cr) (Å) r ref(s)
Cr2(2,6-(2,6-iPr2C6H3)2C6H3)2 1.8351(4) 0.78 6a
Cr2(2,6-(2,6-iPr2C6H3)2-4-SiMe3(C6H2))2 1.8077(7) 0.77 35a
Cr2(N,N′-bis(2,6-diisopropylphenyl)-1,4-diazadiene)2 1.8028(9) 0.77 35e
K[Cr2L] (2red) 1.7407(6) 0.74 this work
Cr2(HC(N(2,4,6-(CH3)3C6H2)2)2 1.7404(8) 0.74 35f
K(crypt-222)[Cr2(HC(N(2,6-(CH3)2C6H3)2)3] 1.7397(9) 0.74 35g, 38
Cr2(Me2NC(N(2,6-iPr2C6H3)2)2 1.7293(12) 0.74 35c
Cr2((2,6-(CH3)2C5H8N)C(2,6-iPr2C6H3)2)2 1.7056(12) 0.73 35d
Cr2− a 1.705(10)b 0.73 39
Cr2a 1.68(1)b 0.72 40
a

Gas phase.

b

Based on a Morse fit of the vibrational frequency or rotational analysis.