DMAN

Title: DMAN
CAS Registry Number: 20734-58-1
CAS Name: N,N,N¢,N¢-Tetramethyl-1,8-naphthalenediamine
Additional Names: 1,8-bis(dimethylamino)naphthalene; proton sponge
Molecular Formula: C14H18N2
Molecular Weight: 214.31
Percent Composition: C 78.46%, H 8.47%, N 13.07%
Literature References: Prototype of a class of neutral aromatic diamines with exceptionally high basicity known as proton sponges. Prepn: W. G. Brown, N. J. Letang, J. Am. Chem. Soc. 63, 358 (1941); and basicity study: R. W. Alder et al., J. Chem. Soc. Chem. Commun. 1968, 723. X-ray crystal structure: H. Einspahr et al., Acta Crystallogr. B29, 1611 (1973). Proton transfer studies: F. Hibbert, J. Chem. Soc. Perkin Trans. 2 1974, 1862. Ab initio structural studies: J. A. Platts et al., J. Org. Chem. 59, 4647 (1994); and fluorescence spectroscopy: A. Szemik-Hojniak et al., J. Am. Chem. Soc. 120, 4840 (1998). Charge distribution: P. R. Mallinson et al., ibid. 121, 4640 (1999). 13C NMR study of hydrogen bonding: M. Pietrzak et al., ibid. 123, 4338 (2001). Catalytic activity: I. Rodriguez et al., J. Catal. 183, 14 (1999). Review of chemistry: H. A. Staab, T. Saupe, Angew. Chem. Int. Ed. 27, 865-879 (1988); R. W. Alder, Chem. Rev. 89, 1215-1223 (1989).
Properties: bp4 144-145°. mp 47-48°. d 1.12. Absorption max: 335 nm (log e 3.96). pKa 12.1.
Melting point: mp 47-48°
Boiling point: bp4 144-145°
pKa: pKa 12.1
Absorption maximum: Absorption max: 335 nm (log e 3.96)
Density: d 1.12
Use: Very strong base in organic synthesis and catalysis.
D-Mannitol Hexanitrate D-manno-Heptulose D-Mannose DMAP DMC

DMAN, also known as Departure Manager is a planning tool developed to improve the departure flows at airports and increase the predictability. DMAN calculates the Target Take Off Times (TTOT) and the Target Startup Approval Times (TSAT) taking multiple constraints and preferences into account. As a result the DMAN provides a planned departure flow with the goal to maintain an optimal throughput at the runway, reduce queuing at holding point and distribute the information to various stakeholders at the airport (i.e. the airline, ground handling and Air Traffic Control (ATC)). EUROCONTROL have defined DMAN as follows:

"DMAN is a planning system to improve departure flows at airports by calculating the Target Take Off Time (TTOT) and Target Start-up Approval Time (TSAT) for each flight, taking multiple constraints and preferences into account."