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首页> 外文期刊>Journal of chemical crystallography >Regiospecific ligand addition to the donor-acceptor compound Ru-2(CO)(6)(bpcd): syntheses and X-ray diffraction structures of Ru-2(CO)(5)L(bpcd) and Ru-2(CO)(5)L[mu-C=C(PPh2)C(O)CH2C(O)](mu(2)-PPh2) (where L = PMe3 and (BuNC)-Bu-t)
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Regiospecific ligand addition to the donor-acceptor compound Ru-2(CO)(6)(bpcd): syntheses and X-ray diffraction structures of Ru-2(CO)(5)L(bpcd) and Ru-2(CO)(5)L[mu-C=C(PPh2)C(O)CH2C(O)](mu(2)-PPh2) (where L = PMe3 and (BuNC)-Bu-t)

机译:区域特异性配体添加到供体-受体化合物Ru-2(CO)(6)(bpcd):Ru-2(CO)(5)L(bpcd)和Ru-2(CO)的合成和X射线衍射结构(5)L [mu-C = C(PPh2)C(O)CH2C(O)](mu(2)-PPh2)(其中L = PMe3和(BuNC)-Bu-t)

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摘要

Thermal and Me3NO-assisted activation of the donor-acceptor complex Ru-2(CO)(6)(bpcd) (1) [where bpcd = 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione] with PMe3 or (BuNC)-Bu-1 affords the mono-substituted complexes Ru-2(CO)(5)L(bpcd), as a result of regiospecific ligand attack at the diphosphine-substituted ruthenium center. Solution NMR measurements (H-1 and P-31) reveal that the PMe3 derivative exists as a noninterconverting mixture of axial (3a) and equatorial (3e) isomers, with the only the equatorial isomer being observed for Ru-2(CO)(5)((BuNC)-Bu-1)(bpcd) (5). Near-UV irradiation of 1 in the presence of added ligand yields Ru2(CO)SL(bpcd), in addition to the known mu(2)-phosphido complex Ru-2(CO)(6)[mu-C=C(PPh2)C(O)CH2C(O)](mu(2)-PPh2) (2) and the corresponding phosphido-substituted complexes Ru-2(CO)(5)L[mu-C=C(PPh2)C(O)CH2C(O)](mu(2)-PPh2) [4 (L = PMe3); 6 (L = (BuNC)-Bu-t)]. As with compounds 3a, 3e, and 5, both 4 and 6 exhibit ligand attachment at the diphosphine-substituted ruthenium center. The molecular structures of 3e, 4, 5, and 6 were determined by X-ray crystallography. 3e, as the 1/2 C6H6 solvate, crystallizes in the monoclinic space group C2/c: a = 40.573(3) Angstrom, b = 10.2663(9) Angstrom, c = 18.347(1) Angstrom, beta = 95.371(6)degrees, V = 7609(1) Angstrom(3) and Z = 8; 4, crystallizes in the monoclinic space group P2(1): a = 10.8241(8) Angstrom, b = 18.074(1) Angstrom, c = 19.194(1) Angstrom, beta = 96.968(6)degrees, V = 3727.3(5) Angstrom(3), and Z = 4; 5, as the 1/2CH(2)Cl(2) solvate, crystallizes in the monoclinic space group C2/c: a = 40.955(3) Angstrom, b = 9.7230(6) Angstrom, c = 20.542(1) Angstrom, beta = 106.596(5)degrees, V = 7839.2(9) Angstrom(3), and Z = 8; 6, as the 1/2C(5)H(12) solvate, crystallizes in the monoclinic space group P2(1)/c: a = 21.773(2) Angstrom, b = 10.907(3) Angstrom, c = 18.744(4) Angstrom, beta = 114.68(1)degrees, V = 4045(1) Angstrom(3), and Z = 4. The site occupied by the PMe3 and (BuNC)-Bu-1 ligands in these compounds is discussed relative to the steric size/electronic properties of the ancillary ligand and its interaction with the bpcd ligand. [References: 21]
机译:供体-受体复合物Ru-2(CO)(6)(bpcd)(1)的热和Me3NO辅助活化[其中,bpcd = 4,5-双(二苯基膦基)-4-环戊烯-1,3-二酮]与PMe3或(BuNC)-Bu-1配合使用时,由于在二膦取代的钌中心发生了区域特异性配体的攻击,因此提供了单取代的复合物Ru-2(CO)(5)L(bpcd)。溶液NMR测量(H-1和P-31)显示,PMe3衍生物以轴向(3a)和赤道(3e)异构体的非互变混合物形式存在,仅观察到Ru-2(CO)的赤道异构体( 5)(((BuNC)-Bu-1)(bpcd)(5)。除已知的mu(2)-磷复合物Ru-2(CO)(6)[mu-C = C( PPh2)C(O)CH2C(O)](mu(2)-PPh2)(2)和相应的磷取代的络合物Ru-2(CO)(5)L [mu-C = C(PPh2)C( O)CH 2 C(O)](mu(2)-PPh2)[4(L = PMe3); 6(L =(BuNC)-Bu-t)]。与化合物3a,3e和5一样,4和6都在二膦取代的钌中心显示配体连接。通过X射线晶体学确定3e,4、5和6的分子结构。 3e作为1/2 C6H6的溶剂化物在单斜空间群C2 / c中结晶:a = 40.573(3)埃,b = 10.2663(9)埃,c = 18.347(1)埃,beta = 95.371(6)度,V = 7609(1)埃(3),Z = 8; 4,在单斜空间群P2(1)/ n中结晶:a = 10.8241(8)埃,b = 18.074(1)埃,c = 19.194(1)埃,beta = 96.968(6)度,V = 3727.3 (5)埃(3),Z = 4;如图5所示,当1 / 2CH(2)Cl(2)溶剂化物在单斜空间群C2 / c中结晶时:a = 40.955(3)埃,b = 9.7230(6)埃,c = 20.542(1)埃, beta = 106.596(5)度,V = 7839.2(9)埃(3),Z = 8;如图6所示,当1 / 2C(5)H(12)溶剂化物在单斜空间群P2(1)/ c中结晶时:a = 21.773(2)埃,b = 10.907(3)埃,c = 18.744(4) ),β= 114.68(1)度,V = 4045(1)埃(3),Z =4。讨论了这些化合物中由PMe3和(BuNC)-Bu-1配体占据的位点辅助配体的空间大小/电子性质及其与bpcd配体的相互作用。 [参考:21]

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