Pentaaqua(dichloromethylenebisphosphonato)strontium(II)

Abstract

The title compound, [Sr{Cl2C(PO3H)2}(H2O)5], is a monomer, the Sr atom being seven‐coordinated by one chelating clodronate ligand and five aqua ligands. The coordination polyhedron can be described as a distorted monocapped trigonal prism. This compound is isostructural with hydrated calcium clodronate, [Ca{Cl2C(PO3H)2}(H2O)5], described previously [Nardelli, Pelizzi, Staibano & Zucchi (1983). Inorg. Chim. Acta, 80, 259–271].

Synthesis and Antioxidant Evaluation of Some New 3‐Substituted Coumarins

“…To conclude thus far, the clodronate L1 tends to chelate and bridge metals with ionic radii of 0.74(Zn 2+ )–1.42(Ba 2+ ) Å 19 to polymeric structures, which form 2D and 3D structures through hydrogen bonding [3a, 3b, 12]. Exceptions are the monomeric strontium 12k, nickel 14 and cobalt complexes (compound 1 ) of clodronic acid and dimeric zinc clodronate 14. The isostructural nickel, zinc, and cobalt complexes form an extended 3D hydrogen‐bond network.…”

Poly[[tetraaqua(μ7-hydrogen dichloromethylenebisphosphonato)(μ5-hydrogen dichloromethylenebisphosphonato)tribarium(II)] monohydrate]

“…The previously reported crystal structures of Ca and Sr complexes of clodronate, [M{Cl 2 C(PO 3 H) 2 }(H 2 O) 5 ] (M is Ca or Sr), revealed that clodronate itself acts only as a bidentate chelating ligand, forming monomeric compounds (Nardelli et al, 1983;Kontturi et al, 2004a). On the other hand, our results show that both clodronate and its partial ester derivative also produce polymers (Kontturi et al, 2002(Kontturi et al, , 2004b.…”

“…The other coordinated O atoms have PÐO distances in the range 1.492 (3)±1.515 (3) A Ê , and the PÐO distances of the remaining, protonated, O atoms are 1.562 (3) and 1.575 (3) A Ê . The other bond distances and angles of the Cl 2 CP 2 O 6 H 3À ligand are all typical (Nardelli et al, 1983;Kontturi et al, 2002Kontturi et al, , 2004a…”

Interactions between Clinically Used Bisphosphonates and Bone Mineral: from Coordination Chemistry to Biomedical Applications and Beyond

“…[85] One of the reasonsf or these discrepancies is the ability of BPs to bind an umber of other metal ions both in solution ands olid state. Apart from alkaline earth metal ions, [86] av ariety of others, [69,87] such as transition metal ions, [88][89][90][91][92][93][94] lanthanides, [95,96] anda lkali metal ions like K + and Na + , [76,93,[97][98][99][100] can be bound. The latter two ions are the most commonb ackground electrolyte cations used in coordination studies in solution.E ven thought hey form the weakestc omplexes of all metal ions, [59,67,97] their influence on the results cannotb ee xcluded.…”

“…One of the reasons for these discrepancies is the ability of BPs to bind a number of other metal ions both in solution and solid state. Apart from alkaline earth metal ions, a variety of others, such as transition metal ions, lanthanides, and alkali metal ions like K + and Na + , can be bound. The latter two ions are the most common background electrolyte cations used in coordination studies in solution.…”