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George N Williams - One of the best experts on this subject based on the ideXlab platform.
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interactions of Thiamine Monophosphate tmp with one and two dimensional polymeric halogenomercurate anions crystal structures of tmp hg2br5 0 5h2o and tmp 2 hg3i8
Inorganica Chimica Acta, 2002Co-Authors: Katsuyuki Aoki, Adegboye O Adeyemo, George N WilliamsAbstract:An investigation into the interactions between Thiamine Monophosphate (TMP) and anions has resulted in the preparation and X-ray characterization of the compounds (TMP)(Hg2Br5).0.5H(2)O (1) and (TMP)(2)(Hg3I8) (2). In each compound the TMP molecule exists as a monovalent cation in the usual F conformation. The halogenomercurate anions occur in two-dimensional (2-D) network in 1 or one-dimensional (1-D) chain in 2. In both 1 and 2, the structures consist of alternating cationic sheets of the hydrogen-bonded TMP molecules and anionic sheets of the polymeric halogenomercurate anions. The TMP molecule binds to the polymeric anions through the characteristic 'anion bridge I', C(2)-H..X...pyrimidinium (X = Br in 1 and 1 in 2), and electrostatic interactions between electropositive S(1) and halogen atoms. The 'anion bridge II' of the type N(4'1)-H...X...thiazolium (X = phosphate group) plays a role in stabilizing the molecular conformation. The biological implication of the host-guest-like complexation between TMP and polymeric anions is discussed.
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metal ion and anion coordination in the Thiamine ptii no2 4 2 system structures of a metal complex pt Thiamine no2 3 and two salts h Thiamine pt no2 4 2h2o and Thiamine Monophosphate 2 pt no2 4 2h2o
Inorganica Chimica Acta, 2001Co-Authors: Katsuyuki Aoki, Adegboye O Adeyemo, George N WilliamsAbstract:Abstract Reaction of Thiamine or Thiamine Monophosphate (TMP) with K2Pt(NO2)4 afforded a metal complex, Pt(Thiamine)(NO2)3 (1), and two salt-type compounds, (H-Thiamine)[Pt(NO2)4]·2H2O (2) and (TMP)2[Pt(NO2)4]·2H2O (3), which were structurally characterized by X-ray diffraction. In 1, the square-planar Pt2+ ion is coordinated to the pyrimidine N(1′), a usual metal-binding site, and three NO2 − groups. The Thiamine molecule exists as a monovalent cation in 1 and a divalent cation in 2 while the TMP molecule is a monovalent cation in 3. In each compound, Thiamine or TMP adopts the usual F conformation and forms two types of host–guest-like interactions with anions, which are of the bridging forms, C(2)H⋯anion⋯pyrimidine-ring and N(4′1)H⋯anion⋯thiazolium-ring. In 3, there is an additional anion–bridging interaction between the pyrimidine and thiazolium rings of TMP, being of the form C(6′)H⋯anion⋯thiazolium-ring. The salts 2 and 3 show similar hydrogen-bonded cyclic dimers of Thiamine or TMP between which the anions are held. Results are compared with those of the other Thiamine–platinum complexes.
Katsuyuki Aoki - One of the best experts on this subject based on the ideXlab platform.
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interactions of Thiamine Monophosphate tmp with one and two dimensional polymeric halogenomercurate anions crystal structures of tmp hg2br5 0 5h2o and tmp 2 hg3i8
Inorganica Chimica Acta, 2002Co-Authors: Katsuyuki Aoki, Adegboye O Adeyemo, George N WilliamsAbstract:An investigation into the interactions between Thiamine Monophosphate (TMP) and anions has resulted in the preparation and X-ray characterization of the compounds (TMP)(Hg2Br5).0.5H(2)O (1) and (TMP)(2)(Hg3I8) (2). In each compound the TMP molecule exists as a monovalent cation in the usual F conformation. The halogenomercurate anions occur in two-dimensional (2-D) network in 1 or one-dimensional (1-D) chain in 2. In both 1 and 2, the structures consist of alternating cationic sheets of the hydrogen-bonded TMP molecules and anionic sheets of the polymeric halogenomercurate anions. The TMP molecule binds to the polymeric anions through the characteristic 'anion bridge I', C(2)-H..X...pyrimidinium (X = Br in 1 and 1 in 2), and electrostatic interactions between electropositive S(1) and halogen atoms. The 'anion bridge II' of the type N(4'1)-H...X...thiazolium (X = phosphate group) plays a role in stabilizing the molecular conformation. The biological implication of the host-guest-like complexation between TMP and polymeric anions is discussed.
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metal ion and anion coordination in the Thiamine ptii no2 4 2 system structures of a metal complex pt Thiamine no2 3 and two salts h Thiamine pt no2 4 2h2o and Thiamine Monophosphate 2 pt no2 4 2h2o
Inorganica Chimica Acta, 2001Co-Authors: Katsuyuki Aoki, Adegboye O Adeyemo, George N WilliamsAbstract:Abstract Reaction of Thiamine or Thiamine Monophosphate (TMP) with K2Pt(NO2)4 afforded a metal complex, Pt(Thiamine)(NO2)3 (1), and two salt-type compounds, (H-Thiamine)[Pt(NO2)4]·2H2O (2) and (TMP)2[Pt(NO2)4]·2H2O (3), which were structurally characterized by X-ray diffraction. In 1, the square-planar Pt2+ ion is coordinated to the pyrimidine N(1′), a usual metal-binding site, and three NO2 − groups. The Thiamine molecule exists as a monovalent cation in 1 and a divalent cation in 2 while the TMP molecule is a monovalent cation in 3. In each compound, Thiamine or TMP adopts the usual F conformation and forms two types of host–guest-like interactions with anions, which are of the bridging forms, C(2)H⋯anion⋯pyrimidine-ring and N(4′1)H⋯anion⋯thiazolium-ring. In 3, there is an additional anion–bridging interaction between the pyrimidine and thiazolium rings of TMP, being of the form C(6′)H⋯anion⋯thiazolium-ring. The salts 2 and 3 show similar hydrogen-bonded cyclic dimers of Thiamine or TMP between which the anions are held. Results are compared with those of the other Thiamine–platinum complexes.
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Thiamine as a cationic host in anion coordination chemistry crystal structures of five anion salts of Thiamine Monophosphate
Bulletin of the Chemical Society of Japan, 2000Co-Authors: Wen Liu, Katsuyuki AokiAbstract:Five anion salts of Thiamine Monophosphate {(TMP), TMP+·Cl-·2H2O (1), TMP+·NO3-·2H2O (2), TMP+·ClO4-·2H2O (3), TMP+·ClO4-·H2O (4), and TMP2+·2CF3SO3- (5)} have been prepared and structurally characterized by X-ray diffraction in order to examine the host-guest-like anion binding in TMP compounds. In each salt, the TMP molecule adopts the usually observed F conformation and, as a cationic host, captures anionic or electronegative guests ( = A) through three kinds of anion-bridging interactions: C2-H…A…pyrimidinium-ring, N4′1-H…A…thiazolium-ring, and C6′-H…A…thiazolium-ring. Compared with the Thiamine system, the TMP system displays more varieties of self-assembled and higher-ordered structures, due to an additional involvement of the phosphate group: a dimeric structure is formed through both `head-to-tail' and `tail-to-tail' hydrogen bonds in 1, where `head' and `tail' refer to the pyrimidinium ring and the phosphate group, respectively; a `head-to-head' hydrogen-bonded dimer forms in 2; each TMP molecule...
Adegboye O Adeyemo - One of the best experts on this subject based on the ideXlab platform.
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interactions of Thiamine Monophosphate tmp with one and two dimensional polymeric halogenomercurate anions crystal structures of tmp hg2br5 0 5h2o and tmp 2 hg3i8
Inorganica Chimica Acta, 2002Co-Authors: Katsuyuki Aoki, Adegboye O Adeyemo, George N WilliamsAbstract:An investigation into the interactions between Thiamine Monophosphate (TMP) and anions has resulted in the preparation and X-ray characterization of the compounds (TMP)(Hg2Br5).0.5H(2)O (1) and (TMP)(2)(Hg3I8) (2). In each compound the TMP molecule exists as a monovalent cation in the usual F conformation. The halogenomercurate anions occur in two-dimensional (2-D) network in 1 or one-dimensional (1-D) chain in 2. In both 1 and 2, the structures consist of alternating cationic sheets of the hydrogen-bonded TMP molecules and anionic sheets of the polymeric halogenomercurate anions. The TMP molecule binds to the polymeric anions through the characteristic 'anion bridge I', C(2)-H..X...pyrimidinium (X = Br in 1 and 1 in 2), and electrostatic interactions between electropositive S(1) and halogen atoms. The 'anion bridge II' of the type N(4'1)-H...X...thiazolium (X = phosphate group) plays a role in stabilizing the molecular conformation. The biological implication of the host-guest-like complexation between TMP and polymeric anions is discussed.
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metal ion and anion coordination in the Thiamine ptii no2 4 2 system structures of a metal complex pt Thiamine no2 3 and two salts h Thiamine pt no2 4 2h2o and Thiamine Monophosphate 2 pt no2 4 2h2o
Inorganica Chimica Acta, 2001Co-Authors: Katsuyuki Aoki, Adegboye O Adeyemo, George N WilliamsAbstract:Abstract Reaction of Thiamine or Thiamine Monophosphate (TMP) with K2Pt(NO2)4 afforded a metal complex, Pt(Thiamine)(NO2)3 (1), and two salt-type compounds, (H-Thiamine)[Pt(NO2)4]·2H2O (2) and (TMP)2[Pt(NO2)4]·2H2O (3), which were structurally characterized by X-ray diffraction. In 1, the square-planar Pt2+ ion is coordinated to the pyrimidine N(1′), a usual metal-binding site, and three NO2 − groups. The Thiamine molecule exists as a monovalent cation in 1 and a divalent cation in 2 while the TMP molecule is a monovalent cation in 3. In each compound, Thiamine or TMP adopts the usual F conformation and forms two types of host–guest-like interactions with anions, which are of the bridging forms, C(2)H⋯anion⋯pyrimidine-ring and N(4′1)H⋯anion⋯thiazolium-ring. In 3, there is an additional anion–bridging interaction between the pyrimidine and thiazolium rings of TMP, being of the form C(6′)H⋯anion⋯thiazolium-ring. The salts 2 and 3 show similar hydrogen-bonded cyclic dimers of Thiamine or TMP between which the anions are held. Results are compared with those of the other Thiamine–platinum complexes.
G N Williams - One of the best experts on this subject based on the ideXlab platform.
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metal ion and anion coordination in the Thiamine pt ii no2 4 2 system structures of a metal complex pt Thiamine no2 3 and two salts h Thiamine pt no2 4 center dot 2h 2 o and Thiamine Monophosphate 2 pt no2 4 center dot 2h 2 o
2001Co-Authors: K Aoki, A O Adeyemo, G N WilliamsAbstract:Reaction of Thiamine or Thiamine Monophosphate (TMP) with K2Pt(NO2)(4) afforded a metal complex, Pt(Thiamine)(NO2)(3) (1), and two salt-type compounds, (H-Thiamine)[Pt(NO2)(4)]. 2H(2)O (2) and (TMP)(2)[Pt(NO2)(4)]. 2H(2)O (3), which were structurally characterized by X-ray diffraction. In 1, the square-planar Pt2+ ion is coordinated to the pyrimidine N(1'), a usual metal-binding site, and three NO2- groups. The Thiamine molecule exists as a monovalent cation in 1 and a divalent cation in 2 while the TMP molecule is a monovalent cation in 3. In each compound, Thiamine or TMP adopts the usual F conformation and forms two types of host-guest-like interactions with anions, which are of the bridging forms, C(2)-H . . . anion . . . pyrimidine-ring and N(4'1)-H(...)anion(...)thiazolium-ring. In 3, there is an additional anion-bridging interaction between the pyrimidine and thiazolium rings of TMP, being of the form C(6')-H . . . anion . . . thiazolium-ring. The salts 2 and 3 show similar hydrogen-bonded cyclic dimers of Thiamine or TMP between which the anions are held. Results are compared with those of the other Thiamine-platinum complexes. (C) 2001 Elsevier Science B.V. All rights reserved.
K Aoki - One of the best experts on this subject based on the ideXlab platform.
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metal ion and anion coordination in the Thiamine pt ii no2 4 2 system structures of a metal complex pt Thiamine no2 3 and two salts h Thiamine pt no2 4 center dot 2h 2 o and Thiamine Monophosphate 2 pt no2 4 center dot 2h 2 o
2001Co-Authors: K Aoki, A O Adeyemo, G N WilliamsAbstract:Reaction of Thiamine or Thiamine Monophosphate (TMP) with K2Pt(NO2)(4) afforded a metal complex, Pt(Thiamine)(NO2)(3) (1), and two salt-type compounds, (H-Thiamine)[Pt(NO2)(4)]. 2H(2)O (2) and (TMP)(2)[Pt(NO2)(4)]. 2H(2)O (3), which were structurally characterized by X-ray diffraction. In 1, the square-planar Pt2+ ion is coordinated to the pyrimidine N(1'), a usual metal-binding site, and three NO2- groups. The Thiamine molecule exists as a monovalent cation in 1 and a divalent cation in 2 while the TMP molecule is a monovalent cation in 3. In each compound, Thiamine or TMP adopts the usual F conformation and forms two types of host-guest-like interactions with anions, which are of the bridging forms, C(2)-H . . . anion . . . pyrimidine-ring and N(4'1)-H(...)anion(...)thiazolium-ring. In 3, there is an additional anion-bridging interaction between the pyrimidine and thiazolium rings of TMP, being of the form C(6')-H . . . anion . . . thiazolium-ring. The salts 2 and 3 show similar hydrogen-bonded cyclic dimers of Thiamine or TMP between which the anions are held. Results are compared with those of the other Thiamine-platinum complexes. (C) 2001 Elsevier Science B.V. All rights reserved.