(R,R)-Hydrobenzoin and homochirally analogous thTeo-compounds of formula Ph-CHX-CHY-Ph (X = Y; X rO Y; Y = H) show anegative O-O CD-line below 37200 crn? and/er a positive one just above it, which can be explained by conformational equilibria around the Ph-C bonds. The Cotton effect at 220-210 nm is negative for this same configuration, if X rO Y (also Y = H), in these other cases there no such...

Six metal-organic frameworks, namely, [Cd(μ(2)-HDMPhIDC)(Py)](n) (H(3)DMPhIDC = 2-(3,4-dimethylphenyl)-1H-imidazole-4,5-dicarboxylic acid, Py = pyridine) (1), [Sr(μ(2)-HDMPhIDC)(H(2)O)](n) (2), {[M1(3)(μ(3)-DMPhIDC)(2)(H(2)O)(6)]·2H(2)O}(n) (M1 = Zn (3), or Mn (4)), [M2(μ(2)-HDMPhIDC)(H(2)O)(2)](n) (M2 = Mg (5), or Ca (6)), have been hydro(solvo)thermally synthesized and structurally characteri...

Using a laser ablation/inert buffer gas ion source coupled with a reflectron time-of-flight mass spectrometer, the gas-phase reactions between the IVA group element ions M(+) (M = Si, Ge, Sn and Pb) and benzene seeded in argon gas were studied. In addition to the association reaction pathway (forming [M(C(6)H(6))(x)](+), x = 1, 2, etc.), benzene was dissociated to form complex ions [M(C(5)H(5))...

Ax, A = amplitude of stroke amplitude in x direction, m, and orientation angle, deg CL, CL = lift coefficient and its average over flapping cycles CD, CD = drag coefficient and its average over flapping cycles CPW, CPW = input power coefficient and its average over flapping cycles c, h = chord and thickness of the plate, m; c is chosen as characteristic length Re = Uc v , Reynolds number, v is ...

Let G x H denote the Kronecker product of graphs G and H. Principal results are as follows: (a) If m is even and n 0 (mod 4), then one component of P,.+l x P,+1, and each component of each of CA x Pn+l, Pm+l x (7, and Cm x C, are edge decomposable into cycles of uniform length rs, where r and s are suitable divisors of m and n, respectively, (b) if m and n are both even, then each component of ...

Let R be the real number axis. Suppose that G, H are Cm maps from R2n+3 to R. In this note, we discuss the system of finite difference equations G(x,f (x), f (x+1), . . . ,f (x+n),g(x),g(x+1), . . . ,g(x+n))= 0 and H(x,g(x),g(x+1), . . . , g(x+n),f (x),f (x+1), . . . ,f (x+n)) = 0 for all x ∈ R, and give some relatively weak conditions for the above system of equations to have unique Cm solutio...