TY - JOUR
T1 - Mercury(II) and Methylmercury(II) Complexes of Novel Sterically Hindered Thiolates
T2 - 13C and 199Hg NMR Studies and the Crystal and Molecular Structures of [MeHg(SC6H2-2,4,6- Pri3)], [Hg(SC6H4-2-SiMe3)2], [Hg(2-SC5H3N-3-SiMe3)2], and [Hg{(2-SC6H4)2SiMe2}]2
AU - Block, Eric
AU - Brito, Maria
AU - Gernon, Michael
AU - McGowty, Deborah
AU - Kang, Hyunkyu
AU - Zubieta, Jon
PY - 1990/8/1
Y1 - 1990/8/1
N2 - Several series of complexes of the types [MeHg(SR)] and [Hg(SR)2] have been synthesized, where the ligands are members of new classes of sterically hindered thiolates, including (triorganosilyl)methanethiols, 2-(triorganosilyl)benzenethiols, 3-(triorganosilyl)pyridine-2-thiols, and bis(2-mercaptophenyl) derivatives. Detailed 1H, 13C, and 199Hg NMR studies revealed several general trends. The 199Hg chemical shifts moved upfield in the order [MeHg(SR)] < [Hg(SCR′R″R‴)2] < [Hg(S-aryl)2] < [Hg(S-pyridyl)2], For the [MeHg(SR)] series of complexes, 1J(Hg-C) correlates with δ(13C(methyl)) and with the type of thiolate ligand. Anomalous behavior is observed for oligomeric species. There is only a limited correlation of δ(199Hg) with steric cone angles for a subset of the complexes. Crystal data are as follows. [CH3Hg(SC6H2-2,4,6·Pri3)]: triclinic [formula omited], a = 5.962 (1) Å, b = 9.649 (1) Å, c = 15.951 (2) Å, a = 79.60 (1)°, β = 79.58 (1)°, γ = 84.68 (1)°, V= 886.1 (10) Å3, Z = 2, Dcalc = 1.69 g cm-3. Structure solution and refinement based on 2115 reflections (Mo Kα; λ = 0.71073 Å) converged at R = 0.0497. [Hg-(SC6H4-2-SiMe3)2]: monoclinic A2/a, a = 6.900 (1) Å, b = 12.856 (2) Å,c = 25.974 (5) Å, β = 104.20 (1)°, V= 2234.1 (11) Å3, Z = 4, Dcalc = 1.67 g cm-3, 1277 reflections, R = 0.0313. [Hg(2-SC5H3N-3-SiMe3)2]: triclinic [formula omited], a = 9.058 (2) Å, b = 9.982 (2) Å, c = 12.639 (3) Å, α = 82.15 (1)°, β = 71.65 (2)°, γ = 79.98 (2)°, V= 1064.3 (10) Å3, Z = 2, Dcalc. = 1.77 g cm-3, 3233 reflections, R = 0.0850. [Hg{(2-SC6H4)2SiMe2}]2: triclinic [formula omited], a = 8.680 (2) Å, b = 12.705 (3) Å, c = 15.053 (4) Å, α = 73.94 (2)°, β = 77.56 (2)°, γ = 70.85 (2)°, Z = 2, Dcalc = 2.12 g cm-3, 1350 reflections, R = 0.0854.
AB - Several series of complexes of the types [MeHg(SR)] and [Hg(SR)2] have been synthesized, where the ligands are members of new classes of sterically hindered thiolates, including (triorganosilyl)methanethiols, 2-(triorganosilyl)benzenethiols, 3-(triorganosilyl)pyridine-2-thiols, and bis(2-mercaptophenyl) derivatives. Detailed 1H, 13C, and 199Hg NMR studies revealed several general trends. The 199Hg chemical shifts moved upfield in the order [MeHg(SR)] < [Hg(SCR′R″R‴)2] < [Hg(S-aryl)2] < [Hg(S-pyridyl)2], For the [MeHg(SR)] series of complexes, 1J(Hg-C) correlates with δ(13C(methyl)) and with the type of thiolate ligand. Anomalous behavior is observed for oligomeric species. There is only a limited correlation of δ(199Hg) with steric cone angles for a subset of the complexes. Crystal data are as follows. [CH3Hg(SC6H2-2,4,6·Pri3)]: triclinic [formula omited], a = 5.962 (1) Å, b = 9.649 (1) Å, c = 15.951 (2) Å, a = 79.60 (1)°, β = 79.58 (1)°, γ = 84.68 (1)°, V= 886.1 (10) Å3, Z = 2, Dcalc = 1.69 g cm-3. Structure solution and refinement based on 2115 reflections (Mo Kα; λ = 0.71073 Å) converged at R = 0.0497. [Hg-(SC6H4-2-SiMe3)2]: monoclinic A2/a, a = 6.900 (1) Å, b = 12.856 (2) Å,c = 25.974 (5) Å, β = 104.20 (1)°, V= 2234.1 (11) Å3, Z = 4, Dcalc = 1.67 g cm-3, 1277 reflections, R = 0.0313. [Hg(2-SC5H3N-3-SiMe3)2]: triclinic [formula omited], a = 9.058 (2) Å, b = 9.982 (2) Å, c = 12.639 (3) Å, α = 82.15 (1)°, β = 71.65 (2)°, γ = 79.98 (2)°, V= 1064.3 (10) Å3, Z = 2, Dcalc. = 1.77 g cm-3, 3233 reflections, R = 0.0850. [Hg{(2-SC6H4)2SiMe2}]2: triclinic [formula omited], a = 8.680 (2) Å, b = 12.705 (3) Å, c = 15.053 (4) Å, α = 73.94 (2)°, β = 77.56 (2)°, γ = 70.85 (2)°, Z = 2, Dcalc = 2.12 g cm-3, 1350 reflections, R = 0.0854.
UR - http://www.scopus.com/inward/record.url?scp=0000328999&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000328999&partnerID=8YFLogxK
U2 - 10.1021/ic00342a024
DO - 10.1021/ic00342a024
M3 - Article
AN - SCOPUS:0000328999
SN - 0020-1669
VL - 29
SP - 3172
EP - 3181
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 17
ER -