Very recently, carbene-analogous aluminum and gallium compounds have been obtained in beautiful synthetic work giving rise to interesting theoretical questions in the framework of qualitative MO theory. We analyze the concept of oxidation numbers and the stabilities of these [{HC(CR′NR′′)2}E] ...
we discuss the importance of the late (Neoproterozoic) onset of the modern plate tectonics regime. We begin by exploring what kinds of tectonics an active silicate body can have and then explain that such bodies likely have complex tectonic ...
we discuss the importance of the late (Neoproterozoic) onset of the modern plate tectonics regime. We begin by exploring what kinds of tectonics an active silicate body can have and then explain that such bodies likely have complex tectonic ...
For instance, the great oxidation event (GOE) between ~1.6–2.5 Ga (2.33 Ga current best estimate [98]) generated relatively high oxygen levels (on at least the percent level) and yet life remained relatively small [99]. Indeed, oxygen levels during the GOE may have briefly rivaled those...
For instance, the great oxidation event (GOE) between ~1.6–2.5 Ga (2.33 Ga current best estimate [98]) generated relatively high oxygen levels (on at least the percent level) and yet life remained relatively small [99]. Indeed, oxygen levels during the GOE may have briefly rivaled those...