An extract on #nescafefrappe
Beginning in 1997, Lara Croft was featured in multiple comics produced by Top Cow Productions. First, she had a cameo in Witchblade, then later in a titular comic book series which ran for fifty issues from 1999 to 2005. An attempt by Top Cow to restart the comic in 2007 stalled due to licensing issues. A new comic book series began in 2014, set within the 2013 reboot's continuity and bridging the narrative gap between the reboot and its sequel.
Colour in transition-series metal compounds is generally due to electronic transitions of two principal types.
charge transfer transitions. An electron may jump from a predominantly ligand orbital to a predominantly metal orbital, giving rise to a ligand-to-metal charge-transfer (LMCT) transition. These can most easily occur when the metal is in a high oxidation state. For example, the colour of chromate, dichromate and permanganate ions is due to LMCT transitions. Another example is that mercuric iodide, HgI2, is red because of a LMCT transition.
A metal-to-ligand charge transfer (MLCT) transition will be most likely when the metal is in a low oxidation state and the ligand is easily reduced.
In general charge transfer transitions result in more intense colours than d-d transitions.
d-d transitions. An electron jumps from one d-orbital to another. In complexes of the transition metals the d orbitals do not all have the same energy. The pattern of splitting of the d orbitals can be calculated using crystal field theory. The extent of the splitting depends on the particular metal, its oxidation state and the nature of the ligands. The actual energy levels are shown on Tanabe-Sugano diagrams.
In centrosymmetric complexes, such as octahedral complexes, d-d transitions are forbidden by the Laporte rule and only occur because of vibronic coupling in which a molecular vibration occurs together with a d-d transition. Tetrahedral complexes have somewhat more intense colour because mixing d and p orbitals is possible when there is no centre of symmetry, so transitions are not pure d-d transitions. The molar absorptivity () of bands caused by d-d transitions are relatively low, roughly in the range 5-500 M1cm1 (where M = mol dm3). Some d-d transitions are spin forbidden. An example occurs in octahedral, high-spin complexes of manganese(II), which has a d5 configuration in which all five electron has parallel spins; the colour of such complexes is much weaker than in complexes with spin-allowed transitions. Many compounds of manganese(II) appear almost colourless. The spectrum of [Mn(H
6]2+ shows a maximum molar absorptivity of about 0.04 M1cm1 in the visible spectrum.