TY - JOUR
T1 - Synthesis, characterization and crystal structures of mono-, di- and trinuclear rhenium(I) tricarbonyl complexes with 2,3,5,6-tetra(2-pyridyl)pyrazine
AU - Chen, Xiaoyuan
AU - Femia, Frank J.
AU - Babich, John W.
AU - Zubieta, Jon
N1 - Funding Information:
This work was supported by a grant from the Department of Energy (DOE), Office of Health and Environmental Research D2-FG02-99ER62791.
PY - 2001/4/16
Y1 - 2001/4/16
N2 - A series of rhenium(I) tricarbonyl complexes with the ligand 2,3,5,6-tetra(2-pyridyl)pyrazine (tppz) were synthesized and characterized crystallographically. Two different coordination modes were found when tppz functions as a monobidentate ligand. Rhenium(I) may be bound to tppz through pyrazine and pyridyl nitrogens completing a 5-membered coordination ring when the reaction was carried out in toluene. However, the same reaction in methanol produced a yellow complex in which rhenium(I) was bound to tppz through two adjacent pyridyl nitrogens with a 7-membered coordination ring. In the presence of an excess amount of [ReBr(CO)5], the dinuclear complex [{ReBr(CO)3}2(μ-tppz)] (3) was isolated, while the trinuclear complex [{ReCl(CO)3}3(μ-tppz)] (4) was obtained in the case of [ReCl(CO)5]. Crystal data for 1, C27H16ClN6O3Re·MeOH: monoclinic, P21/n, a = 9.2217(7), b = 10.7628(8), c = 26.932(2) Å, β = 94.130(1)°, V = 2666.1(3) Å3, Z = 4. 2, C27H16BrN6O3Re: monoclinic, P21/n, a = 9.2931(6), b = 10.2387(7), c = 27.993(2) Å, β = 94.615(1)°, V = 2654.8(3) Å3, Z = 4. 1′, C27H16ClN6O3Re· 2H2O: monoclinic, C2/c, a = 18.584(4), b = 21.693(5), c = 15.392(4) Å, β = 122.328(3)°, V = 5243(2) Å3, Z = 8. 3, C30H16Br2N6O6 Re2: triclinic, P1̄, a = 7.4668(6), b = 11.4902(10), c = 19.3736(16) Å, α = 73.659(2), β = 85.183(2), γ = 77.097(1)°, V = 1554.3(2) Å3, Z = 2. 4, C33H16Cl3N6O9 Re3·1/2C6H6: orthorhombic, Pbca, a = 18.828(1), b = 16.715(1), c = 25.366(2) Å, V = 7983.2(10) Å3, Z = 8.
AB - A series of rhenium(I) tricarbonyl complexes with the ligand 2,3,5,6-tetra(2-pyridyl)pyrazine (tppz) were synthesized and characterized crystallographically. Two different coordination modes were found when tppz functions as a monobidentate ligand. Rhenium(I) may be bound to tppz through pyrazine and pyridyl nitrogens completing a 5-membered coordination ring when the reaction was carried out in toluene. However, the same reaction in methanol produced a yellow complex in which rhenium(I) was bound to tppz through two adjacent pyridyl nitrogens with a 7-membered coordination ring. In the presence of an excess amount of [ReBr(CO)5], the dinuclear complex [{ReBr(CO)3}2(μ-tppz)] (3) was isolated, while the trinuclear complex [{ReCl(CO)3}3(μ-tppz)] (4) was obtained in the case of [ReCl(CO)5]. Crystal data for 1, C27H16ClN6O3Re·MeOH: monoclinic, P21/n, a = 9.2217(7), b = 10.7628(8), c = 26.932(2) Å, β = 94.130(1)°, V = 2666.1(3) Å3, Z = 4. 2, C27H16BrN6O3Re: monoclinic, P21/n, a = 9.2931(6), b = 10.2387(7), c = 27.993(2) Å, β = 94.615(1)°, V = 2654.8(3) Å3, Z = 4. 1′, C27H16ClN6O3Re· 2H2O: monoclinic, C2/c, a = 18.584(4), b = 21.693(5), c = 15.392(4) Å, β = 122.328(3)°, V = 5243(2) Å3, Z = 8. 3, C30H16Br2N6O6 Re2: triclinic, P1̄, a = 7.4668(6), b = 11.4902(10), c = 19.3736(16) Å, α = 73.659(2), β = 85.183(2), γ = 77.097(1)°, V = 1554.3(2) Å3, Z = 2. 4, C33H16Cl3N6O9 Re3·1/2C6H6: orthorhombic, Pbca, a = 18.828(1), b = 16.715(1), c = 25.366(2) Å, V = 7983.2(10) Å3, Z = 8.
KW - Bidentate complexes
KW - Carbonyl complexes
KW - Crystal structures
KW - Rhenium complexes
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U2 - 10.1016/S0020-1693(01)00335-8
DO - 10.1016/S0020-1693(01)00335-8
M3 - Article
AN - SCOPUS:0035897152
SN - 0020-1693
VL - 315
SP - 66
EP - 72
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1
ER -