HP Rolls Out New Printers, 3D Scanning, Better Cloud Printing. On Thursday, HP announced 13 new printers and scanners, many of which target the small and midsize business market. This new range of printers and scanners emphasizes Web-connected printing and advanced scanning. HP's TopShot Laserjet Pro M275 can scan 3D objects.
Typically, a single bond is a sigma bond while a multiple bond is composed of one sigma bond together with pi or other bonds. A double bond has one sigma plus one pi bond, and a triple bond has one sigma plus two pi bonds.
Carbon-carbon single and multiple bonds. In the new eFF, carbon-carbon single bonds have the bond-centered closed-shell form as in the old eFF; but double and triple bonds now exist as banana bonds instead of sigma-pi bonds (Figure 5.12).