TY - JOUR
T1 - Synthesis and Structural Characterization of Layered Calcium and Lanthanide Phosphonate Salts
AU - Cao, Guang
AU - Lynch, Vincent M.
AU - Swinnea, J. Steven
AU - Mallouk, Thomas E.
PY - 1990/5/1
Y1 - 1990/5/1
N2 - The crystal structures of two layered calcium phosphonate salts, Ca(O3PCH3)·H2O and Ca(HO3PC6H13)2, were solved by single-crystal X-ray diffraction. Ca(O3PCH3)·H2O is monoclinic, space group P21/c, with Z = 4, a = 8.8562 (13) Å, b = 6.6961 (10) Å, c = 8.1020 (10) Å, β; = 96.910 (11)°, and V = 476.97 (12) Å3. Ca atoms are coordinated by six oxygen atoms at a distance of ca. 2.4 Å, and by a seventh at 2.7 Å, making the coordination environment a distorted pentagonal bipyramid. In this salt, and in the structurally related M(O3PCnH2n+1)·H2O (n ≤ 5; M = Ca, Cd) series, the metal-phosphonate coordination is 5:5. Ca-(HO3PC6H13)2 is triclinic, space group P1, with Z = 2, a = 5.606 (2) Å, b = 7.343 (3) Å, c = 21.158 (7) Å, α = 97.31 (3)°, β = 96.98 (3)°, γ = 90.43 (4)°, and V = 857.2 (6) Å3. In this structure and the related Ca(HO3PCnH2+1)2 (6 < n < 18) series, the Ca atoms lie in approximately coplanar sheets and are coordinated by six oxygen atoms from different phosphonate groups lying above and below the plane. This structure is closely related to that of α-Zr(HPO4)2·H2O and the tetravalent metal phosphonates M(O3PR)2 (M = Zr, Hf, Ti, Ce). Layered trivalent metal phosphonate salts MH(O3PR)2 (R = alkyl, phenyl; M = La, Sm, Ce) were also prepared. LaH(Ò3PCH3)2 is triclinic with Z = 2, a = 5.398 (7) Å, b = 8.168 (18) Å, c = 10.162 (19) Å, α = 73.76 (16)°, β = 83.89 (13)°, γ = 73.50 (14)°, and V = 412.3 (13) Å3. The structure of the MH(O3PR)2 compounds appears to be closely related to that of the other 1:2 layered metal phosphonate salts Ca(HO3PCnH2n+1)2 and M(O3PR)2.
AB - The crystal structures of two layered calcium phosphonate salts, Ca(O3PCH3)·H2O and Ca(HO3PC6H13)2, were solved by single-crystal X-ray diffraction. Ca(O3PCH3)·H2O is monoclinic, space group P21/c, with Z = 4, a = 8.8562 (13) Å, b = 6.6961 (10) Å, c = 8.1020 (10) Å, β; = 96.910 (11)°, and V = 476.97 (12) Å3. Ca atoms are coordinated by six oxygen atoms at a distance of ca. 2.4 Å, and by a seventh at 2.7 Å, making the coordination environment a distorted pentagonal bipyramid. In this salt, and in the structurally related M(O3PCnH2n+1)·H2O (n ≤ 5; M = Ca, Cd) series, the metal-phosphonate coordination is 5:5. Ca-(HO3PC6H13)2 is triclinic, space group P1, with Z = 2, a = 5.606 (2) Å, b = 7.343 (3) Å, c = 21.158 (7) Å, α = 97.31 (3)°, β = 96.98 (3)°, γ = 90.43 (4)°, and V = 857.2 (6) Å3. In this structure and the related Ca(HO3PCnH2+1)2 (6 < n < 18) series, the Ca atoms lie in approximately coplanar sheets and are coordinated by six oxygen atoms from different phosphonate groups lying above and below the plane. This structure is closely related to that of α-Zr(HPO4)2·H2O and the tetravalent metal phosphonates M(O3PR)2 (M = Zr, Hf, Ti, Ce). Layered trivalent metal phosphonate salts MH(O3PR)2 (R = alkyl, phenyl; M = La, Sm, Ce) were also prepared. LaH(Ò3PCH3)2 is triclinic with Z = 2, a = 5.398 (7) Å, b = 8.168 (18) Å, c = 10.162 (19) Å, α = 73.76 (16)°, β = 83.89 (13)°, γ = 73.50 (14)°, and V = 412.3 (13) Å3. The structure of the MH(O3PR)2 compounds appears to be closely related to that of the other 1:2 layered metal phosphonate salts Ca(HO3PCnH2n+1)2 and M(O3PR)2.
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U2 - 10.1021/ic00336a016
DO - 10.1021/ic00336a016
M3 - Article
AN - SCOPUS:0001472575
SN - 0020-1669
VL - 29
SP - 2112
EP - 2117
JO - Inorganic chemistry
JF - Inorganic chemistry
IS - 11
ER -