کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1306994 | 975115 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Syntheses and single crystal structures of chiral tetrahedral clusters containing osmium
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
New chiral tetrahedral clusters (μ3-S)OsCoMo(CO)8C5H4C(O)R(R = H 2, CH3 3, C6H4C(O)OCH3 4) were synthesized by the reaction of the precursor (μ3-S)OsCo2(CO)9 1 with the functionally substituted metal exchange reagents [Mo(CO)3(η5-C5H4)C(O)R]â (R = H, CH3, C6H4C(O)OCH3). Then clusters 2, 3 and 4 were treated with 2,4-dinitrophenylhydrazine to obtain clusters (μ3-S)OsCoMo(CO)8C5H4CNNHC6H3(NO2)2R (R = H 5, CH3 6, C6H4C(O)OCH3 7), respectively. All the clusters were characterized by Element Analysis, IR and 1H NMR. The structures of clusters 3 and 4 were established by X-ray single crystal diffraction. Interestingly, carbonyl group on the cyclopentadienyl ligand and cyclopentadienyl ring are not in the same plane, in cluster 3, torsion angle C27-C28-C29-O18 is â176.1(9), but in cluster 4, torsion angle C12-C13-C14-O9 is 167.5(17), which shows that carbonyl function group on the cyclopentadienyl ligand offsets the cyclopentadienyl ring more markedly than that in cluster 3. It showed that both conjugated effects and space hinder of phenyl ring in the cluster 4 are important factors to decide atoms positioning in three-dimensional structure of the clusters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 362, Issue 13, 15 October 2009, Pages 4659-4662
Journal: Inorganica Chimica Acta - Volume 362, Issue 13, 15 October 2009, Pages 4659-4662
نویسندگان
Bin Hu, Quan-Yi Zhao, Chun-Gu Xia, Yuan-Qi Yin,