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ÎÊÌâÈçÏ£¬ ÎÒÔõô¿´²»¶®ÄØ£¿Çë¸ßÊÖ½â¾ö¡£ There is serious doubt about the nature of the transition elements reported here. The ADPs of all ¡®heterometals¡¯ are bigger than those of the Ni in the macrocycle (and also those of the oxygen atoms they are coordinated to). For example in the case of Zn: Atom Type Ueq Um Uvol Ni1 Ni 0.041 0.041 0.034 Zn1 Zn 0.081 0.080 0.096 O1 O 0.058 0.057 0.056 O2 O 0.052 0.052 0.050 The only way these crystallographic results can be verified is by examining these structures with their original reflection files (hkl or fcf). The reported R values are also very large for structures of this type (three first row transition elements!). Also, the numbers given in the table do not agree with the value provided in the cif file for Structure Mn - where the reported values (6.82, 21.91) are significantly lower than the values from the cif. Structure Mn Fe Co Ni Cu Zn R1 (cif) 9.77 5.63 7.63 8.18 7.14 9.55 wR2(cif) 25.68 14.52 21.18 26.68 19.87 31.31 These R factors are unacceptable in structures of this type and point to serious issues with these structures. |
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