Cyclohexylammonium trichloro(cyclohexylamine)platinate(II)

Lock, C. J. L.; Zvagulis, M.

doi:10.1107/s0567740881005682

Cited by 3 publications

(3 citation statements)

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“…Despite the wide use of hexamethylphosphoric acid triamide (HMPA), no structural data for the pure system have been reported, but there is some information available about the uncoordinated system from at least three crystal structure determinations. [48][49][50][51] For the related system OdP(NH 2 ) 3 structural data show that the molecular conformation in the crystal is largely dominated by hydrogen bridges. 52 The most intriguing difference to the systems dicussed above is that in all these structures the OdP(NMe 2 ) 3 molecules contain three almost planar nitrogen environments.…”

Section: Resultsmentioning

confidence: 99%

Low Symmetry in P(NR₂)₃ Skeletons and Related Fragments: An Inherent Phenomenon

et al. 1996

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A single-crystal X-ray diffraction study at 110 K and ab initio calculations up to the MP2/6-31G* level of theory showed that the ground state of P(NMe2)3 has C s symmetry, with two different coordination geometries at the nitrogen atoms (pyramidal and planar). The calculated and experimentally determined geometries are in good agreement. Steric strain could be ruled out as the predominant factor causing the deviation from the expected C 3 symmetry, because ab initio calculations on the model system P(NH2)3 (up to MP2/6-311G**) also indicate C s symmetry for the ground-state structure, whereas calculations on N(NH2)3 have predicted this molecule to have C 3 symmetry. The structure of the phosphorane H2CP(NMe2)3 has been elucidated by X-ray diffraction in the solid state (110 K) and by electron diffraction in the gas phase augmented by restraints derived from ab initio calculations up to the MP2/6-31G* level of theory. Solid-state and gas-phase structures are in good agreement showing again the C s arrangement to be the ground-state structure of the molecule. Ab initio calculations (MP2/6-311G**) indicate that H2CP(NH2)3 also has C s symmetry. The reasons for the preference for C s rather than C 3 symmetry adopted by the P(NR2)3 units are discussed in terms of steric repulsion, lone pair, and other electronic interactions. Literature reports of structures of derivatives containing P(NMe2)3 units are discussed in the light of the new results. Selected structural results include: P(NMe2)3 (XRD, average values); PN(1/2) 1.687, PN(3) 1.731 Å, N(1)PN(2) 110.8, N(3)PN(1/2) 97.7°, ∑∠ at N(1/2) 355.9, at N(3) 337.6°; H2CP(NMe2)3 (GED/XRD average without esd); PC(1) 1.620(5)/1.655(6), PN(1/2) 1.684(3)/1.668, PN(3) 1.718(6)/1.698(4) Å, N(1)PN(2) 115.2(13)/114.7(2), N(1/2)PN(3) 97.0(5)/99.6, C(1)PN(1/2) 110.0(5)/110.0, C(1)PN(3), 127.1(8)/122.4(4)°, ∑∠ at N(1/2) 359.5(11)/353.4, at N(3) 332.9(13)/337.3(6)°.

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Section: Resultsmentioning

confidence: 99%

Low Symmetry in P(NR₂)₃ Skeletons and Related Fragments: An Inherent Phenomenon

et al. 1996

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“…For the Brønsted-Lowry basicity behavior of cyclohexylamine, see: Solomons (1996). For the preparation of salts of anions and complex anions with cyclohexyl primary ammonium cations, see: Jones et al (1998); Kolev et al (2007); Lock et al (1981); Muthamizhchelvan et al (2005); Wang et al (2005); Yun et al (2004). For precautions relating to the reaction of cyclohexylamine with strong acids or oxidizing agents, see: Chang (2008); Patnaik (2007).…”

Section: Related Literaturementioning

confidence: 99%

“…However, metal oxides or hydroxides were formed along with C 6 H 11 NH 3 + NO 3 -, which reflects the Brønsted-Lowry basicity of CHA (pK b = 3.36, Solomons, 1996). This base strength makes CHA suitable for the preparation of several salts of anions and complex anions through the formation of the primary ammonium cation (C 6 H 11 NH 3 + ) (Jones et al, 1998;Kolev et al, 2007;Lock et al, 1981;Muthamizhchelvan et al, 2005;Shimada et al, 1955;Smith et al, 1994;Wang et al, 2005;Yun et al, 2004). This Brønsted-Lowry behavior was responsible for the formation of the present compound, (I) ( Fig.…”

Section: S1 Commentmentioning

confidence: 99%