O-tetratin(IV) , [[(CH 3 ) 2 -SnO 2 CCHCl 2 ] 2 O] 2 , two Sn atoms are six-coordinate in a C 2 SnO 4 skew-trapezoidal bipyramidal geometry [CÐSnÐC 145.7 (4) ]. The other two Sn atoms are ®ve-coordinate [CÐ SnÐC 154.3 (4) ], but the geometry is better regarded as a trans-C 2 SnO 4 octahedron owing
Bis[3-(4-methylcoumarinyl-7-oxy)-μ-methoxy-1,1,3,3-tetramethyldistannoxane]
✍ Scribed by Zhang, Yiqun ;Khoo, Lian Ee ;Tou, Teck Yong ;Ng, Seik Weng
- Publisher
- International Union of Crystallography
- Year
- 2003
- Tongue
- English
- Weight
- 214 KB
- Volume
- 59
- Category
- Article
- ISSN
- 1600-5368
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📜 SIMILAR VOLUMES
In centrosymmetric octamethyl-1 2 C,2 2 C,3 2 C,4 2 C-tetrakis-"-benzoato O H ;2:3 2 O;3:4 2 O,O H ;[[(CH 3 ) 2 SnO 2 CC 6 H 5 ] 2 O] 2 ; the exocyclic Sn atom is ®ve-coordinated and has a trans±C 3 SnO 2 trigonal bipyramidal geometry [CÐSnÐC = 139.4 (2) ] and the endocyclic Sn atom is six-coordinat
Single-crystal X-ray study T = 294 K Mean '(C±C) = 0.003 A Ê R factor = 0.029 wR factor = 0.077 Data-to-parameter ratio = 19.7 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
The molecule of the title compound, C 18 H 22 O 4 , has a center of symmetry. Molecules are linked into a zigzag chain via an O-HÁ Á ÁO hydrogen bond. The chains are further linked by O-HÁ Á ÁO and C-HÁ Á Á interactions to form a layer.
The title compound, C 14 H 28 O 2 S 4 , possesses a crystallographically imposed inversion centre and has two methine C atoms linked to methoxymethyl functional groups. It is in the exodentate conformation, with the four S atoms lying on the edges of the `rectangular' macrocycle. The lone pairs of e