Synthesis and Crystal Structure of (1,3-~tBu_2C_5H_3)_2Sm( μ-Cl)_2Li(THF)_2

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Anhydrous SmCl 3 reacts with two equal of Li(1,3 tBu 2C 5H 3) to give a complex (1,3 tBu 2C 5H 3) 2Sm( μ Cl) 2Li(THF) 2(C 34 H 58 Cl 2LiO 2Sm, M r =726.99), monoclinic, space group P2 1/n, a=10.615(2), b=21.037(4), c=17.166(3), β=93.60(3)°, V=3825^7(13) 3, Z=4, D c =1.262Mg/m 3, μ =1.699mm -1 and F (000)=1508, final R= 0.0387 and wR =0.0741 for 5320 observed[ I2σ(I)] reflections. The average Sm-C distance is 2^73. Sm-Cl1 and Sm-Cl2 distances are 2^719(2) and 2.697(2), respectively. Two 1,3 tBu 2C 5H 3 ring centroids and two μ 2 bridging chloride atoms around Sm atom form a distorted tetrahedron. Anhydrous SmCl 3 reacts with two equal of Li (1,3 tBu 2C 5H 3) to give a complex (1,3 tBu 2C 5H 3) 2Sm (μ Cl) 2Li (THF) 2 (C 34 H 58 Cl 2LiO 2Sm, M = 726.99), monoclinic, space group P2 1 / n, a = 10.615 (2), b = 21.037 (4), c = 17.166 (3) , β = 93.60 (3) °, V = 3825 ^ 7 (13)  3, Z = 4, D c = 1.262Mg / m 3, μ = 1.699mm -1 and F (000) = 1508, final R = 0.0387 and wR = 0.0741 for 5320 observed [I2σ (I)] reflections. The average Sm-C distance is 2 ^ 73. Sm-Cl1 and Sm-Cl2 distances are 2 ^ 719 (2) and 2.697 (2) , respectively. tBu 2C 5H 3 ring centroids and two μ 2 bridging chloride atoms around Sm atom form a distorted tetrahedron.
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