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A new kind of binuclear tungsten complex{W_2[SC(NH_2)NHCH_2CHCH_2J_3Cl_6}·H_2Owas synthesized by mixing a concentrated hydrochloric acid solution of[W_2Cl_9]~(3-)with allylthiourea andinvestigated by X-ray structural analysis.The crystal is monoclinic,belonging to the space groupP2_1,with the following parameters:a=8.496(1)A,b=18.760(2)A,c=8.591(1)A,β=91.36(1)°and Z=2 with Do=2.297 g.cm(-3).The structure was solved by heavy atom method and differenceFourier synthesis and refined by full-matrix least-squares technique to a final R factor of 0.038 for2812 independent reflections with I≥3σ(I).The result shows that in the structure each W atom forms an octahedral coordination with threeCl atoms and three bridging S atoms of the allylthiourea molecules.These two octahedra share a com-mon face to form a binuclear complex with a very much shorter W-W bond distance(2.443(1)A),indicating a strong interaction between the two W atoms.Judging from the orientation of the thiourealigand groups with respect to the W-S bonds,the thiourea S atoms are coordinated to the two W atomsin different manners.It is noted that one of the two W atoms is located at the point of intersection ofthe three thiourea planes,while the other W atom is located quite apart from these thiourea planeswith three W-S bonds nearly perpendicular to each of them respectively.
A new kind of binuclear tungsten complex {W_2 [SC (NH_2) NHCH_2CHCH_2J_3Cl_6} · H_2Owas synthesized by mixing a concentrated hydrochloric acid solution of [W_2Cl_9] ~ (3-) with allylthiourea and investigated by X-ray structural analysis. The crystal is monoclinic, (1) A and b = 18.760 (2) A, c = 8.591 (1) A, β = 91.36 (1) ° and Z = 2 with Do = 2.297 g.cm (-3) .The structure was solved by heavy atom method and differenceFourier synthesis and refined by full-matrix least-squares technique to a final R factor of 0.038 for2812 independent reflections with I≥3σ (I). The result shows that in the structure each W atom forms an octahedral coordination with three Cl atoms and three bridging S atoms of the allylthiourea molecules. the two two octahedra share a com-mon face to form a binuclear complex with a very much shorter bond distance (2.443 (1 ) A), indicating a strong interaction between the two W atoms. Judging from the orientation of the thiourealigand groups with respect to the WS bonds, the thiourea S atoms are coordinated to the two W atoms in different manners. It is noted that one of the two W atoms is located at the point of intersection of the three thiourea planes, while the other W atom is located quite apart from these thiourea planes with three WS bonds nearly perpendicular to each of them respectively.