The n orbitals on the two CO molecules interact with the same lobe of a vacant 3p orbital on a metal atom in the model for the acute angle coordination, and with different lobes for the obtuse angle coordination (Scheme 29b). Cychc orbital interaction occurs between the occupied 3s orbital and the vacant 3p orbitals on M and the n orbitals, n, and n, of the CO molecules (Scheme 29c). The phase is continuous for the same lobe interaction and discontinuous for the different lobe interaction (Scheme 29d, cf. Scheme 4). The acute-angle coordination is favored. [Pg.110]

Renee is putting a stairway in her house. If she wants the stairway to make an angle of 20 degrees to the ceiling, what obtuse angle should the stairway make to the floor ... [Pg.157]

Note from (4.33) that sdM hybrids present two possible angles of maximum concentration, the acute angle (aacute) an(l the obtuse angle (a0btuse) ... [Pg.377]

Geometrical consequences of Bent s rule. Relative to idealized ML, angles, increased d character (increased bond polarity) tends to decrease acute angles and increase obtuse angles for n > 4, but has little effect for n < 3 (near-perpendicular bond angles). [Pg.422]

A and B differ in the angle which the trajectory of the nucleophile forms with the plane of the olefin. For obtuse angles, the Felkin-Anh model is preferred, as the steric crowding outside the olefin has to be minimized (attack from the side of S). In contrast, B (Houk model)41 is superior for acute angles (minimal steric crowding inside the olefin). [Pg.127]

When axes are chosen on morphological grounds there is a convention, not always followed, that the principal zone axis is called c, and that, of the other two, the longer is called b and the obtuse angles between the axes are usually specified, rather than the acute angles. [Pg.48]

A pipe sampler is an off-the-belt sampler that collects increments from within the stream cross section by means of one or two pipes. The sampling pipes are mounted at an obtuse angle on a horizontal axle positioned at right angles to the direction in which the coal flows and increments are collected through an orifice that is located in the bottom wall of the sampling pipe. [Pg.32]

An obtuse angle is an angle that measures more than 90 degrees, but less than 180 degrees. [Pg.180]

Any combination of an acute and obtuse angle will be supplementary. [Pg.183]

An obtuse angle measures more than 90° but less then 180°. [Pg.100]

In this situation, any acute angle added to any obtuse angle is supplementary. mZl + mZ2 = 180°... [Pg.105]

Because c d, you know that the sum of an acute angle and an obtuse angle formed by an intersecting line (line... [Pg.106]

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