Crystal structure of methylenediphosphonic acid

Abstract

Publication costs assisted by The National Research Council of CanadaMethylenediphosphonic acid is monoclinic with space group p 2 1 / c and has lattice parameters a = 7.840(9), b = 5.494(3), c = 13.746(6) A'and p = 103.69(7)", with Z = 4. The structure was refined by fullmatrix least squares to a final R value of 0.032 with 1173 reflections measured with a Syntex automatic diffractometer. The P-C bonds are 1.790(3) and 1.794(3) A in length with a P-C-P angle of 117.2(1)". The P-0 bond lengths are 1.494(2) and 1.500(2) A while the average P-0(-H) bond length is 1.546 A.Each of the oxygen atoms involved in the former bonds is an acceptor for two hydrogen bonds.

Diammonium diaquabis(methylenediphosphonato-κ2O,O′)cobaltate(II)

“…All the bonding distances and angles fall within the normal range observed for complexes of this nature (DeLaMatter et al, 1973;Jurisson et al, 1983 andStahl et al, 2006).…”

“…For related structures, see: DeLaMatter et al (1973); Jurisson et al (1983); Barthelet et al (2002); Stahl et al (2006).…”

Rational Development of New Cooling Water Chemical Treatment Programs for Scale and Microbial Control

“…As the pH decreases, they propose that the tetradentate literature. In addition, an extensive number of structures of bis phosphonates 21,22,23 exist, AMP becomes tridentate because the central N is protonated, and gets "pushed-back," away from the Ca center. The proposed structure was said to be consistent with the one proposed previously, which was based on infrared spectroscopy.…”

Disodium diaquabis(methylenediphosphonato-κ2O,O′)cobaltate(II) dihydrate

“…For related structures, see: Bon et al (2010); DeLaMatter et al (1973); Harmony et al (1984); Jurisson et al (1983); Van der Merwe et al (2010). For bond lengths and angles in related structures, see: Bao et al (2003); Cao et al (2007); Gong et al (2006); Van der Merwe et al (2009) ;Visser et al (2010); Yin et al (2003).…”