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ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

[ÇóÖú] MOFµ¥¾§½á¹¹ÇóÖú ÒÑÓÐ1È˲ÎÓë

×î½ü×ö³öÒ»¸öMOFµÄµ¥¾§£¬Ï뾡¿ìͶ³ö£¬µ«ÊÇ·¢ÏÖÉó¸åÈ˶Ô×Ô¼ºµÄ¾§Ìå½á¹¹·ÖÎöÉÏÓÐЩÒâ¼û¡£ÓÉÓÚ×Ô¼ºÒ²ÊǸոսøÈëÕâ¸öÁìÓò£¬ËùÒÔ»¹Óкö಻¶®µÄµØ·½£¬ÏëÇë¸÷λţÈ˰ïæ·ÖÎöÒ»ÏÂÕâ¸ö¾§ÌåµÄ½á¹¹¡£
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As an example:

It is stated that

"...each asymmetric unit contains one crystallographic independent zinc atom and
two unique 1,3-diacetoxy-imidazole molecules."

which is false: only one cation on a symmetry element (amounting for half an
independent unit) and one unique anion fill the asymmetric unit, with z=8.
The authors have decided (and they are fully entitled to do so) to describe the
elemental structural unit as twice as much, with z=4, but then the unit IS NOT
FULLY independent.

The description as a 3D framework is also wrong: this is not a 3D but a 2D  
covalent framework parallel to (001), linked by extremely weak C-H...O and
pi...pi contacts (See attached files to find some RELEVANT non-covalent
interactions.
The H-bond mentioned as responsible of the link between 2D structures is
nonsense (H..O too long with a rather small angle). The real link (even if weak)
is the one involving H3.

½ð±Ò²»¶à£¬Èç¹û°ïæ½âÎöµÄÕæµÄºÜÈÏÕæ£¬ºÜÔ¸ÒâÔÙ´Î×·¼Ó¸ø´ó¼Ò£¬ÔٴθÐл´ó¼Ò£¡£¡£¡
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  • ¸½¼þ 1 : cd211146.cif
  • 2014-02-23 11:31:29, 12.16 K

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2Â¥2014-02-23 12:30:44
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ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

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2Â¥: Originally posted by anlongstar at 2014-02-23 12:30:44

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3Â¥2014-02-23 16:20:06
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sdujjt

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4Â¥2014-02-23 21:19:08
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ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
4Â¥: Originally posted by sdujjt at 2014-02-23 21:19:08
ÊDz»ÊÇzÖµ´íÁË£¿ÖØÐ½âÎöÏ£¬²»ÊÇÈýάµÄ£¬ÃèÊö´íÁË

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5Â¥2014-02-24 09:02:40
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tangbohejin

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