Bond Definition and 324 Threads

BOND (Building Object Network Databases) started development in late 2000 as a rapid application development tool for the GNOME Desktop by Treshna Enterprises. Its aim was to fill a gap that traditional Microsoft Windows applications like Borland Delphi, Microsoft Access and Visual Basic filled on the Windows desktop, but targeted for the Linux environment. Its goal was to allow developers to quickly build database forms in XML for backend SQL databases. It has been employed extensively by Treshna Enterprises to develop applications such as PayMaster (an opensource payroll application) and GymMaster (a commercial gym management application).

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  1. D

    Does Bond Length Always Equal Bond Strength?

    Bond length, Bond strength, relationship ? Is this always true ? And why? My answer to this question would be, having larger electron density between two nuclei, thus attraction, allows them to position more closely. But somehow I think that there could be some exceptions of this rule...
  2. B

    'Nature of the chemical bond' By L.Pauling

    I recently scoured through Amazon to find a somewhat decent chemistry book, and these are the list of books I am interested in at the moment: Advanced chemistry 1,2 by Phillip C Matthews of Trinity college Dublin Nature of the chemical bond by l.Pauling I got the first 2 books by...
  3. G

    James Bond Meets a Hyderabad Guy - What Happens Next?

    James Bond Style: The character James Bond has a peculiar style of introducing himself by calling first Bond, then followed by great smile & finally James Bond. His style is absolutely killing but he doesn't know the consequences when he meets our great South Indian guy. When Bond meets a...
  4. C

    Why Are Bond Enthalpies Restricted to Gaseous State?

    Bond enthalpies... Apparently from what I have read, mean bond enthalpies are only given for things in gaseous state - why is this the case? Why can we not quote bond enthalpies in, say, the solid or liquid state? Thanks. :-D
  5. C

    Exploring the Double Bond: Why is it Different?

    Double bond... We always talk about the double bond in an alkene being an area of particularly high electron density, which induces charges on other molecules, which is what usually causes it to react. But why is this only the case for double not single? I mean, single bonds are not overly...
  6. E

    Energy Exchange in N2 + H2 Reaction: Examining the Bond Changes

    When N2 and H2 are reacted in a bomb calorimeter to form NH3 the temperature of the bomb calorimeter and the water it contains increases. Is the energy required to break the bonds in the reactants greater or less than the energy released during the formation of the bonds of the prouducts. I...
  7. D

    Bond sizes in organic chemistry

    I know that a double bond has the two atoms closer to each other than a single bond. I have to build an organic acid model for chemistry and would like to know: - Is there a ratio between the lengths of C-C bonds to C=C bonds? - Are C-H bonds closer together than C-C bonds? - Are C=O bonds...
  8. N

    Very simple polar covalent bond questions

    polar covalent bonds occur because one atom is much more electronegative than the other right? so..an example of a polar covalent bond is C-H ?
  9. U

    Difference between bond polarity and molecular polarity?

    what is the difference between bond polarity and molecular polarity?
  10. G

    Smallest Bond Angle in NH3, PI3?

    Which compound has the smallest bond angle in the series NH3 PH3 AsH3 PI3 AsI3 SbI3 I would think that the molecule with the smallest center atom would have the smallest bond angles because the lone electron pair is held closer to the bonds which means it can push them...
  11. M

    Why Does Water Expand When it Freezes?

    I read that water expands when it freezes due to it's hydrogen bond. What on Earth (or ocean, for that matter) does a hydrogen bond have to do with becoming less dense with freezing :confused: ? Please explain taking into consideration that I haven't taken chem. since 10th grade. Thanks!
  12. G

    Bond Dissociation Energy of 2Cl: 58 kcal/mole

    Given: Cl2 = 58 kcal/mole ------> 2cl 1. 58 kcal/mole is the bond dissociation energy T F 2. 58 kcal/mole is an entropy term T F 3. this reactin is endothermic T F I don't understand get it! Any help woud be appreciated.
  13. C

    Why Do Double Bonds Not Allow Bond Rotation?

    Why in organic chemistry do double bonds not allow rotation of bonds, whilst single bonds do? Thanks. :smile:
  14. E

    Valence Bond question (Chemistry)

    I'm working a problem with the BH3 molecule. Therefore boron is 1s^2 2s^2 2p^1, and using the hypotetical method, it forms hybird sp2 orbitals. Promoting an electron to get 1s^2 2s^1 2p^2. My question is that, it will form 3 bonding orbitals, one from the 1s and 2 from the 2p orbitals... what...
  15. E

    BH3 Valence Bond: Explaining 3 Bonding Orbitals

    I'm working a problem with the BH3 molecule. Therefore boron is 1s^2 2s^2 2p^1, and using the hypotetical method, it forms hybird sp2 orbitals. Promoting an electron to get 1s^2 2s^1 2p^2. My question is that, it will form 3 bonding orbitals, one from the 1s and 2 from the 2p orbitals...
  16. T

    FXe2 Bond Angle: 104.5° or 90°?

    Hey Guys! i was wondering what would be the bond angle of FXe2..would it be 104.5 or 90? thanx Tanya
  17. T

    Xe-F-Xe Bond Angle - Is it 104.5?

    What is the bond angle for Xe- F- Xe ?..is it 104.5? Tanya
  18. I

    Forgiveness: How Can I Rebuild My Father-Daughter Bond?

    how can i forgive my father? this is a family issue. yes, i and my father had a big quarrel. i feel like i have lost my trust in him. the reason why i don't trust him any more is because he left me when i needed him most! even if he has reliazed his fault, but still we don't have the good old...
  19. JasonRox

    A simple question about Covalent Bond and Ionic Bond

    I started reading a book about the basic foundations of chemistry, and I came up across a simple question. To answer this question you should understand that there are variable valencies, which is what this question consists of. If you look at the cuprous chloride compound CuCl, copper has...
  20. M

    Understanding the Concept of Hybrid Bonds: A Basic Explanation

    I probably should ask this in the atomic physics section, but there seem little, if not no activity there... I am wondering what Hybrid bond is. I took two semester of lower division Chem. and that's it! Now, after getting my physics B.S., I realize that I don't really understand what it is...
  21. C

    Understanding Bond Order: Exploring the Concept

    Does anyone know what border is.
  22. B

    Using Spartan to calculate bond engery

    I have a question concering how to use spartan to caclulate bond energies. please tell me if i am right Lets say for example i want to calculate the enegery of ozone 03 Ozone has on double bond and one single bond (these can be swtich around, thus it has resonace structures) Ok...
  23. J

    C2H4 Bond Energy | Bond Breaking & Adding Energy

    if you have a chemical like C2H4 and you add Br2 to get the change in energy would you have to break every bond and add it up and then subtract something. If you do have to subtract something what would it be. The bond energy of each bond maybe.
  24. denian

    Hydrogen Bonding in CH3-C=O-CH3 and Its Role in Intermolecular Interactions

    just a simple question. can CH3- C=O - CH3 molecules form hydrogen bond with H2O?
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